Optical member driving mechanism

ABSTRACT

An optical member driving mechanism for driving an optical member having an optical axis is provided, including a fixed portion, a movable portion, a driving assembly, and a circuit board. The fixed portion includes a case and a frame, and a gap is formed therebetween. The movable portion is movably connected to the fixed portion, and configured to hold the optical member. The driving assembly can drive the movable portion to move relative to the fixed portion. The circuit board is disposed in the gap, and has a plate portion and a protruding portion. The protruding portion is disposed between the plate portion and the fixed portion, so as to tightly dispose the circuit board in the gap.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims priority to U.S. Provisional PatentApplications No. 62/703,147, filed in Jul. 25, 2018, and No. 62/741,825,filed on Oct. 5, 2018, and China Patent Applications No. 201921020406.0,filed on Jul. 2, 2019, which are incorporated by reference herein intheir entirety.

BACKGROUND OF THE INVENTION Field of the Invention

The application relates in general to an optical member drivingmechanism, and in particular, to an optical member driving mechanismhaving a circuit board.

Description of the Related Art

Thanks to technological advancements, the latest consumer electronicdevices (such as tablet computers and smartphones) now usually include alens module capable of aiding in photography or recording video. Theseelectronic devices have become commonplace, and have been developed tobe more convenient and thin. More and more choices are available forusers to choose from.

An electronic device having a lens module usually comprises a pluralityof components. When assembling the components, pressure needs to beapplied. The components may curve due to the pressure, the detection ofthe position of the lens may be inaccurate, and the lens module cannotprecisely control the position of the lens. Therefore, how to addressthe aforementioned problem has become an important issue.

BRIEF SUMMARY OF INVENTION

To address the deficiencies of conventional products, an embodiment ofthe invention provides an optical member driving mechanism for drivingan optical member having an optical axis, including a fixed portion, amovable portion, a driving assembly, and a circuit board. The fixedportion includes a case and a frame, and a gap is formed therebetween.The movable portion is movably connected to the fixed portion, andconfigured to hold the optical member. The driving assembly can drivethe movable portion to move relative to the fixed portion. The circuitboard is disposed in the gap, and has a plate portion and a protrudingportion. The protruding portion is disposed between the plate portionand the fixed portion, so as to tightly dispose the circuit board in thegap.

In some embodiments, the plate portion has a first surface and a secondsurface, respectively faces the frame and the case. The protrudingportion is situated between the frame and the first surface and contactsthe frame. The second surface contacts the case. The fixed portionfurther includes a base disposed on a side of the movable portion, andthe base contacts the first surface, wherein the base is closer to theplate portion than the frame as seen from a direction that isperpendicular to the optical axis.

In some embodiments, the plate portion has a first surface and a secondsurface, respectively faces the frame and the case. The protrudingportion is situated between the case and the second surface, theprotruding portion contacts the case, and the first surface contacts theframe.

In some embodiments, the protruding portion does not overlap the base.The base has a supporting portion, disposed on a peripheral area of thebase and extending along the optical axis. The supporting portion isattached on a first surface of the plate portion.

In some embodiments, the optical member driving mechanism furtherincludes a sensor disposed on the circuit board, and the protrudingportion overlaps the sensor as seen from a direction that isperpendicular to the optical axis. A recess is formed on the protrudingportion, and the sensor is disposed in the recess.

In some embodiments, the base has a top surface and a bottom surface,and the case has a bending portion, a case surface, and a depression.The top surface faces the movable portion, the bottom surface issituated between the top surface and the bending portion, and thedepression is formed on the case surface. The frame has a frame surfaceand a protrusion formed on the frame surface. The frame surface and thecase surface are perpendicular to the optical axis, the frame surfacefaces the case surface, and the protrusion is accommodated in thedepression.

In some embodiments, the movable portion has an accommodating hole foraccommodating the optical member. The accommodating hole includes asmooth segment, a threaded segment, and a connecting segment. The smoothsegment and the threaded segment are arranged along the optical axis,and the connecting segment connects the smooth segment to the threadedsegment. The wall surface of the smooth segment is parallel to theoptical axis, and the wall surface of the connecting segment isperpendicular to the optical axis.

In some embodiments, the driving assembly includes a coil module, andthe coil module includes a first wire and a second wire in parallel.Both the first wire and the second wire have rectangular cross-sectionsand are adhesive. The rectangular cross-sections of the first wireand/or the second wire have fillets. The first wire is attached on theoptical member holder and disposed between the optical member holder andthe second wire. The stacking rectangular cross-sections of the firstwire and/or the stacking rectangular cross-sections of the second wireare aligned to each other as seen from the optical axis. The stackingrectangular cross-sections of the first wire are aligned to the stackingrectangular cross-sections of the second wire as seen from a directionthat is perpendicular to the optical axis.

BRIEF DESCRIPTION OF DRAWINGS

The invention can be more fully understood by reading the subsequentdetailed description and examples with references made to theaccompanying drawings, wherein:

FIG. 1 shows a schematic diagram of an optical component drivingmechanism according to an embodiment of the present disclosure.

FIG. 2 shows an exploded diagram of the optical component drivingmechanism according to the embodiment of the present disclosure.

FIG. 3 shows a schematic cross-sectional view along line 1-A-1-A′ inFIG. 1 according to the embodiment of the present disclosure.

FIG. 4 is a partial structural diagram of the optical component drivingmechanism 1-100 according to an embodiment of the present disclosure.

FIG. 5 is a top view of FIG. 4 according to an embodiment of the presentdisclosure.

FIG. 6 is a partial enlarged diagram of FIG. 5 according to anembodiment of the present disclosure.

FIG. 7 is a side view of FIG. 4 according to an embodiment of thepresent disclosure.

FIG. 8 is a top view of a partial structure of the optical componentdriving mechanism according to an embodiment of the present disclosure.

FIG. 9 is a bottom view of a partial structure of the optical componentdriving mechanism according to an embodiment of the present disclosure.

FIG. 10 is a cross-sectional view of the optical component drivingmechanism installed on an external circuit board according to anembodiment of the present disclosure.

FIG. 11 is a perspective diagram of a first optical element and a secondoptical element joined with a driving system in accordance with anembodiment of the invention.

FIG. 12 is a perspective diagram of the driving system in FIG. 11 withthe housings and the image sensing units removed therefrom.

FIG. 13 is a bottom view showing relative position between the first andsecond optical elements, the housings, and the first and second magneticelements in the first and second modules after assembly.

FIG. 14 is a side view of the first and second optical elements joinedwith a driving system in accordance with another embodiment of theinvention.

FIG. 15 shows a first optical element, a second optical element and athird optical element joined with a driving system in accordance withanother embodiment of the invention.

FIG. 16 shows the arrangement of the first, second and third magneticelements in the first, second and third modules after assembly.

FIG. 17 shows the arrangement of the first, second and third magneticelements in the first, second and third modules after assembly, inaccordance with another embodiment of the invention.

FIG. 18 is a side view of a first optical element, a second opticalelement and a third optical element joined with a driving system inaccordance with another embodiment of the invention, wherein at least anelectronic element is disposed between the first and second opticalelements or between the second and third optical elements, so as toimprove space utilization of the camera lens system.

FIG. 19 is a perspective diagram of a chassis surrounding the first,second and third modules and the first, second and third opticalelements, in accordance with another embodiment of the invention.

FIG. 20 is a perspective diagram of the chassis in FIG. 19.

FIG. 21 is a top view showing relative positions of the magneticelements, the circuit board in the first, second and third modules andthe chassis of FIG. 20 after assembly.

FIG. 22 is a schematic diagram of an electronic device according to anembodiment of the invention.

FIG. 23 is a schematic diagram of an optical member driving mechanismaccording to an embodiment of the invention.

FIG. 24 is an exploded-view diagram of the optical member drivingmechanism according to an embodiment of the invention.

FIG. 25 is a cross-sectional view along the line 3-A-3-A in FIG. 23.

FIG. 26 is a schematic diagram of the natural oscillation of the opticalmember holder after the control module inputs the main signal accordingto an embodiment of the invention.

FIG. 27 is a schematic diagram of the reverse driving force provided bythe driving assembly after the control module inputs the steady signalaccording to an embodiment of the invention.

FIG. 28 is a schematic diagram of the oscillation of the optical memberholder after receiving the reverse driving force according to anembodiment of the invention.

FIG. 29 is a schematic diagram of an optical member driving mechanismaccording to another embodiment of the invention.

FIG. 30 is an exploded-view diagram of the optical member drivingmechanism according to another embodiment of the invention.

FIG. 31 is a cross-sectional view along the line 3-B-3-B in FIG. 29.

FIG. 32 shows a perspective view of an optical module in accordance withan embodiment of this disclosure.

FIG. 33 shows an exploded view of an optical module in accordance withan embodiment of this disclosure.

FIG. 34 shows a schematic view of a circuit component embedded in a basein accordance with an embodiment of this disclosure.

FIG. 35 shows a perspective view of a circuit component in accordancewith an embodiment of this disclosure.

FIG. 36 shows a schematic view of a partial structure of an opticalmodule in accordance with an embodiment of this disclosure.

FIG. 37 shows a schematic view of a partial structure of an opticalmodule in accordance with an embodiment of this disclosure.

FIG. 38 shows a schematic view of a partial structure of an opticalmodule in accordance with an embodiment of this disclosure.

FIG. 39 shows a perspective view of a circuit board in accordance withan embodiment of this disclosure.

FIG. 40 shows a cross-sectional view of an optical module along line4-A-4-A′ in FIG. 32.

FIG. 41 shows a schematic view of a partial structure of an opticalmodule in accordance with an embodiment of this disclosure.

FIG. 42 shows a perspective view of a partial structure of an opticalmodule which cut along line 4-B-4-B′ in FIG. 32.

FIG. 43 shows a top view of a partial structure of an optical module inaccordance with an embodiment of this disclosure.

FIG. 44 shows a schematic view of a partial structure of an opticalmodule in accordance with an embodiment of this disclosure.

FIG. 45 shows a schematic view of a partial structure of an opticalmodule in accordance with an embodiment of this disclosure.

FIG. 46 shows a schematic view of a structure of a dual optical moduleusing an optical module according to an embodiment of this disclosure.

FIG. 47 shows a schematic view of an optical module in accordance withan embodiment of this disclosure.

FIG. 48 shows a schematic view of an optical module in accordance withan embodiment of this disclosure.

FIG. 49 is a perspective view of an optical module in some embodimentsof the present disclosure.

FIG. 50 is an exploded view of the optical module in FIG. 49.

FIG. 51 is a cross-sectional view illustrated along line 5-A-5-A′ inFIG. 49.

FIG. 52 is a schematic view of some elements of the optical module.

FIG. 53 is a top view of some elements of the optical module.

FIGS. 54 and 55 are enlarged views of the region 5-R1 in FIG. 53 viewedin different directions.

FIG. 56 is a schematic view of some elements of the optical module.

FIG. 57 is a cross-sectional view illustrated along line 5-B-5-B′ inFIG. 56.

FIG. 58 is an enlarged view of the region 5-R2 in FIG. 57.

FIG. 59 is a bottom view of some elements of the optical module in someembodiments of the present disclosure.

FIGS. 60 and 61 are enlarged views of the region 5-R3 in FIG. 59.

FIG. 62 is an enlarged view of the region 5-R4 in FIG. 59.

FIG. 63 is a side view of some elements of the optical element in someembodiments of the present disclosure.

FIG. 64 is an enlarged view of FIG. 63.

FIG. 65 is a side view of some elements of the optical element in someembodiments of the present disclosure.

FIG. 66 is an enlarged view of FIG. 65.

FIG. 67 is a side view of some elements of the optical element in someembodiments of the present disclosure.

FIG. 68 is an enlarged view of FIG. 67.

FIG. 69 is a top view of the optical module in some embodiments of thepresent disclosure.

FIG. 70 is a schematic view of a driving mechanism according to someembodiments of the present disclosure.

FIG. 71 is an exploded view of a driving mechanism according to someembodiments of the present disclosure.

FIG. 72 is a cross-sectional view illustrated along a line 6-A-6-A′ inFIG. 70.

FIG. 73 is a top view of some elements of the driving mechanism in someembodiments of the present disclosure.

FIG. 74 is a cross-sectional view illustrated along a line 6-B-6-B′ inFIG. 73.

FIG. 75 is a cross-sectional view illustrated along a line 6-C-6-C′ inFIG. 73.

FIG. 76 is a cross-sectional view illustrated along a line 6-D-6-D′ inFIG. 73.

FIG. 77 is a schematic view of some elements of the driving mechanism insome embodiments of the present disclosure.

FIG. 78 is an enlarged view of some elements of the driving mechanism inFIG. 77.

FIG. 79 is a side view of the driving mechanism in FIG. 77.

FIG. 80 is a top view of a driving mechanism according to someembodiments of the present disclosure.

FIG. 81 is a top view of a frame in some embodiments of the presentdisclosure.

FIG. 82 is a schematic view of some elements of the driving mechanism insome embodiments of the present disclosure.

FIGS. 83 and 84 are top views of some elements of the driving mechanismin some embodiments of the present disclosure.

FIG. 85 is a schematic view of a holder and a first driving coil in someembodiments of the present disclosure.

FIG. 86 is an enlarged view of a portion of FIG. 85.

FIG. 87 is a cross-sectional view illustrated along a line 6-E-6-E′ inFIG. 73.

FIG. 88 is a cross-sectional view illustrated along a line 6-F-6-F′ inFIG. 73.

FIGS. 89 and 90 are side views of the frame in FIG. 77 when viewed in Xand Y directions, respectively.

FIG. 91 is a top view of some elements of the driving mechanism in someembodiments of the present disclosure.

FIG. 92 is an enlarged view of a portion of FIG. 91.

FIG. 93 is a schematic diagram of an electronic device according to anembodiment of the invention.

FIG. 94 is a schematic diagram of an optical member driving mechanismaccording to an embodiment of the invention.

FIG. 95 is an exploded-view diagram of the optical member drivingmechanism according to an embodiment of the invention.

FIG. 96 is a cross-sectional view along the line 7-A-7-A in FIG. 94.

FIG. 97 is a cross-sectional view along the line 7-B-7-B in FIG. 94.

FIG. 98 is a cross-sectional view along the line 7-C-7-C in FIG. 94.

FIG. 99 is a schematic diagram of an optical member driving mechanismaccording to another embodiment of the invention.

FIG. 100 is a schematic diagram of a circuit board according to anembodiment of the invention.

FIG. 101 is a schematic diagram of an optical member driving mechanismaccording to another embodiment of the invention.

FIG. 102 is an exploded-view diagram of the optical member drivingmechanism according to another embodiment of the invention.

FIG. 103 is a cross-sectional view along the line 7-A′-7-A′ in FIG. 101.

FIG. 104 shows a perspective diagram of an optical element disposed in adriving mechanism in accordance with an embodiment of the invention.

FIG. 105 shows a perspective diagram of the driving mechanism in FIG.104 with the housing removed therefrom.

FIG. 106 shows the circuit board and the base after assembly of thedriving mechanism.

FIG. 107 shows a top view of the base, the magnetic elements, and theholder 8-LH after assembly of the driving mechanism.

FIG. 108 shows a partial cross-sectional view taken along line 8-X1-8-X1in FIG. 104.

FIG. 109 is a perspective view showing the object and the coil disposedon the holder.

FIG. 110 is a partial enlarged view showing the object inserted in arecess of the holder.

FIG. 111 is an enlarged partial cross-sectional view of the drivingmechanism in FIG. 104.

FIG. 112 is a perspective diagram of three optical elements received ina driving system in accordance with an embodiment of the invention.

FIG. 113 is a perspective diagram of the driving system in FIG. 112.

FIG. 114 is a perspective diagram of the driving system of FIG. 112 withthe housings removed therefrom.

FIGS. 115-117 are perspective diagrams and top view of the drivingsystem with the housings, the frames, and the holders removed therefrom.

FIG. 118 are shows a side view of the first, second and third modules.

FIGS. 119-125 show different arrangements of the first, second and thirdterminals, the first, second and third magnetic elements, and the first,second and third circuit boards in the driving system.

FIGS. 126 and 127 are perspective diagrams of a driving system inaccordance another embodiment of the invention.

FIG. 128 shows a perspective schematic view of an optical elementdriving mechanism according to the present disclosure.

FIG. 129 shows an exploded view of the optical element driving mechanismaccording to the present disclosure.

FIG. 130 shows a schematic view of a fixed part, a movable part and alower spring of the optical element driving mechanism according to thepresent disclosure.

FIG. 131 shows a schematic view of the optical element driving mechanismomitting a frame and an outer frame, according to the presentdisclosure.

FIG. 132 shows a partial schematic view of an inner electricalconnection part and a driving assembly of the optical element drivingmechanism according to the present disclosure.

FIG. 133 shows a cross-sectional view of the optical element drivingmechanism according to the present disclosure along line 10-A-10-A inFIG. 128.

FIG. 134 shows a cross-sectional view of the optical element drivingmechanism according to the present disclosure along line 10-B-10-B inFIG. 128.

FIG. 135 shows a top view of the movable part, a standing wall and aposition sensing assembly of the optical element driving mechanismaccording to the present disclosure.

FIG. 136 shows a perspective view of an optical element driving systemaccording to the present disclosure.

FIG. 137 shows a perspective view of the optical element driving systemomitting outer frames and optical elements, according to the presentdisclosure.

FIG. 138 is a schematic diagram of a portable device according to anembodiment of the present disclosure.

FIG. 139 is a schematic diagram of a portable device according toanother embodiment of the present disclosure.

FIG. 140 is a schematic diagram of a portable device according toanother embodiment of the present disclosure.

DETAILED DESCRIPTION OF INVENTION

In the following detailed description, for the purposes of explanation,numerous specific details and embodiments are set forth in order toprovide a thorough understanding of the present disclosure. The specificelements and configurations described in the following detaileddescription are set forth in order to clearly describe the presentdisclosure. It will be apparent, however, that the exemplary embodimentsset forth herein are used merely for the purpose of illustration, andthe inventive concept can be embodied in various forms without beinglimited to those exemplary embodiments. In addition, the drawings ofdifferent embodiments can use like and/or corresponding numerals todenote like and/or corresponding elements in order to clearly describethe present disclosure. However, the use of like and/or correspondingnumerals in the drawings of different embodiments does not suggest anycorrelation between different embodiments. The directional terms, suchas “up”, “down”, “left”, “right”, “front” or “rear”, are referencedirections for accompanying drawings. Therefore, using the directionalterms is for description instead of limiting the disclosure.

In this specification, relative expressions are used. For example,“lower”, “bottom”, “higher” or “top” are used to describe the positionof one element relative to another. It should be appreciated that if adevice is flipped upside down, an element at a “lower” side will becomean element at a “higher” side.

The terms “about” and “substantially” typically mean +/−20% of thestated value, more typically +/−10% of the stated value and even moretypically +/−5% of the stated value. The stated value of the presentdisclosure is an approximate value. When there is no specificdescription, the stated value includes the meaning of “about” or“substantially”.

Please refer to FIG. 1 to FIG. 3. FIG. 1 shows a schematic diagram of anoptical component driving mechanism 1-100 according to an embodiment ofthe present disclosure, FIG. 2 shows an exploded diagram of the opticalcomponent driving mechanism 1-100 according to the embodiment of thepresent disclosure, and FIG. 3 shows a schematic cross-sectional viewalong line 1-A-1-A′ in FIG. 1 according to the embodiment of the presentdisclosure. The optical component driving mechanism 1-100 can be anoptical camera mechanism and can be configured to hold and drive anoptical component (not shown in the figures). The optical componentdriving mechanism 1-100 can be installed in different electronic devicesor portable electronic devices, such as a smartphone or a tabletcomputer, for allowing a user to perform the image capturing function.In this embodiment, the optical component driving mechanism 1-100 can bea voice coil motor (VCM) with an auto-focusing (AF) function, but it isnot limited thereto. In other embodiments, the optical component drivingmechanism 1-100 can also perform the functions of auto-focusing andoptical image stabilization (OIS).

As shown in FIG. 1 to FIG. 3, in the present embodiment, the opticalcomponent driving mechanism 1-100 mainly includes a fixed assembly (mayinclude a casing 1-102, a frame 1-104 and a base 1-112), a first elasticmember 1-106, a movable assembly (may include a holder 1-108), and adriving assembly (may include a first magnet 1-M11, a second magnet1-M12, and a driving coil 1-DCL), a second elastic member 1-110, acircuit assembly 1-114 and a sensing component 1-116.

The holder 1-108 is movable relative to the fixed assembly. The holder1-108 is configured to hold an optical component (not shown), such as acamera lens, and the optical component defines an optical axis 1-O. Itshould be noted that in other embodiments, the component in the fixedassembly may also be adjusted to be movable (i.e., included in themovable assembly) according to actual needs.

As shown in FIG. 2, the casing 1-102 has a hollow structure, and acasing opening 1-1021 is formed on the casing 1-102. A base opening1-1121 is formed on the base 1-112. The center of the casing opening1-1021 corresponds to an optical axis 1-O of the optical component. Thebase opening 1-1121 corresponds to an image sensing element (now shownin the figures) disposed below the base 1-112. External light can enterthe casing 1-102 through the casing opening 1-1021, and then to bereceived by the image sensing element (not shown) after passing throughthe optical component and the base opening 1-1121, so as to generate adigital image signal.

In addition, the casing 1-102 may include an accommodating space 1-1023for accommodating the frame 1-104, the holder 1-108, the first elasticmember 1-106, the first magnet 1-M11, the second magnet 1-M12, thedriving coil 1-DCL, the circuit assembly 1-114, and so on. In thisembodiment, the circuit assembly 1-114 may be a circuit board, and thedriving assembly is electrically connected to the circuit assembly 1-114and can drive the holder 1-108 to move relative to the fixed assembly(for example, to move relative to the base 1-112).

In this embodiment, the optical component driving mechanism 1-100includes two driving magnetic element (a first magnet 1-M11 and a secondmagnet 1-M12), and each driving magnetic element may be a longstrip-shaped structure, but the number of magnets and their shape arenot limited to the above. For example, they may be shaped differently inother embodiments. In addition, the first magnet 1-M11 or the secondmagnet 1-M12 can be a multi-pole magnet. In one embodiment, the firstmagnet 1-M11 has a first side MS1 and a second side 1-MS2. The firstside MS1 is not parallel to the second side 1-MS2, and both the firstside MS1 and the second side 1-MS2 are perpendicular to the optical axis1-O. In one embodiment, the ratio of the length of the first side MS1 tothe length of the second side 1-MS2 is greater than or equal to 8.Because the driving magnetic element has a large volume, it is possibleto increase the magnetic force and reduce the problem of thermaldemagnetization.

As shown in FIG. 2 and FIG. 3, the frame 1-104 is securely disposed onan inner wall surface of the casing 1-102, and the first magnet 1-M11and the second magnet 1-M12 can also be securely disposed on the frame1-104 and the inner wall surface of the casing 1-102. As shown in FIG. 2and FIG. 3, in this embodiment, the driving coil 1-DCL can be a windingcoil and is disposed surround the holder 1-108. In addition, the drivingcoil 1-DCL corresponds to the first magnet 1-M11 and the second magnet1-M12. When the driving coil 1-DCL is provided with electricity, thedriving coil 1-DCL acts with the first magnet 1-M11 and the secondmagnet 1-M12 to generate an electromagnetic driving force, to drive theholder 1-108 and the optical component to move along the optical axis1-O (the Z-axis) relative to the base 1-112.

Furthermore, as shown in FIG. 2 and FIG. 3, in this embodiment, theouter portion of the first elastic member 1-106 is fixed to the frame1-104. Similarly, the outer portion of the second elastic member 1-110is fixed to the four corners of the base 1-112. In addition, the innerportions of the first elastic member 1-106 and the second elastic member1-110 are respectively connected to the upper side and lower side of theholder 1-108 such that the holder 1-108 is movably connected to theframe 1-104 through the first elastic member 1-106 and the secondelastic member 1-110. Therefore, the holder 1-108 can be suspendedwithin the frame 1-104 (as shown in FIG. 3). Thus, the driving assemblycan drive the holder 1-108 to move relative to the frame 1-104.

Please refer to FIG. 4 and FIG. 5, FIG. 4 is a partial structuraldiagram of the optical component driving mechanism 1-100 according to anembodiment of the present disclosure, and FIG. 5 is a top view of FIG. 4according to an embodiment of the present disclosure. As shown in FIG. 4and FIG. 5, the optical component driving mechanism 1-100 defines afirst side 1-51 and a second side 1-S2. The circuit assembly 1-114extends in the direction of the optical axis 1-O, and the circuitassembly 1-114 is disposed on the first side 1-51 and the second side1-S2 in a flexible manner. The first side 1-51 and the second side 1-S2are not parallel. For example, the first side 1-51 is perpendicular tothe second side 1-S2.

Specifically, the circuit assembly 1-114 can include an outer connectingportion 1-1142 and an inner connecting portion 1-1144. The outerconnecting portion 1-1142 and the inner connecting portion 1-1144 arerespectively located at the first side 1-51 and the second side 1-S2.Based on such a configuration, the flexibility of the optical componentdriving mechanism 1-100 to cooperate with other external components canbe improved, and it is convenient for assembly.

The driving magnetic element may be disposed on the first side 1-51 orthe second side 1-S2. In this embodiment, as shown in FIG. 5, the firstmagnet 1-M11 is disposed on the first side 1-S1, and when viewed in thedirection of the optical axis 1-O, the first magnet 1-M11 partiallyoverlaps the circuit assembly 1-114, so as to achieve the purpose ofminiaturization.

Furthermore, as shown in FIG. 5, when viewed in the direction of theoptical axis 1-O, the circuit assembly 1-114 does not overlap the holder1-108, and the circuit assembly 1-114 partially overlaps the base 1-112,so that the purpose of miniaturization can be further achieved.

It should be noted that, in one embodiment, as shown in FIG. 5, thelength of the circuit assembly 1-114 is greater than 40% of the outercircumference length of the optical component driving mechanism 1-100.Based on this design, the stability of the disposing the circuitassembly 1-114 can be improved.

In addition, as shown in FIG. 5, the optical component driving mechanism1-100 further includes a sensing assembly, the sensing assembly caninclude the sensing component 1-116 and an electronic component 1-118,and the sensing assembly is disposed on the circuit assembly 1-114 andlocated between the circuit assembly 1-114 and the movable assembly (theholder 1-108). The sensing component 1-116 is configured to sense amagnetic field of a magnetic component (not shown in the figures)disposed on the holder 1-108 so as to obtain a position of the holder1-108 relative to the base 1-112. The electronic component 1-118 can bea signal filter, and the sensing component 1-116 is electricallyconnected to the outer connecting portion 1-1142 via the electroniccomponent 1-118. Because the circuit assembly 1-114 is disposed on thebase 1-112 in an L shape, and the driving magnetic element and thesensing assembly are respectively disposed on the first side 1-S1 andthe second side 1-S2, it can prevent the sensing assembly from magneticinterference.

Next, please refer to FIG. 6, which is a partial enlarged diagram ofFIG. 5 according to an embodiment of the present disclosure. In thisembodiment, the outer connecting portion 1-1142 or the inner connectingportion 1-1144 may be a straight portion of the circuit assembly 1-114.The circuit assembly 1-114 may further include a bent portion 1-1146,and a thickness 1-TB of the bent portion 1-1146 is less than a thickness1-TA of the outer connecting portion 1-1142 or of the inner connectingportion 1-1144. Therefore, the circuit assembly 1-114 can be bent moreeasily, and the purpose of miniaturization can al so be achieved.

Next, please refer to FIG. 7, which is a side view of FIG. 4 accordingto an embodiment of the present disclosure. In this embodiment, theinner connecting portion 1-1144 is configured to be electricallyconnected to the second elastic member 1-110. Specifically, the innerconnecting portion 1-1144 has a first connecting portion 1-1145 and asecond connecting portion 1-1147. The second elastic member 1-110 has aplate-shaped structure, and the surfaces of the first connecting portion1-1145 and the second connecting portion 1-1147 are not parallel to anextending direction of the second elastic member 1-110 (for example, theX-axis or the Y-axis), so as to reduce the areas of the first connectingportion 1-1145 and the second connecting portion 1-1147, so that thepurpose of miniaturization can be achieved.

Furthermore, as shown in FIG. 7, the first connecting portion 1-1145 andthe second connecting portion 1-1147 have different structures whenviewed in a direction perpendicular to the optical axis 1-O. Forexample, the first connecting portion 1-1145 is a U-shaped structure,and the second connecting portion 1-1147 is substantially a L-shapedstructure, so that the length of the inner connecting portion 1-1144 canbe further reduced so as to achieve the purpose of miniaturization.

It should be noted that the second elastic member 1-110 is connected tothe first connecting portion 1-1145 and the second connecting portion1-1147 by using solder (not shown in the figures). After welding, thecasing 1-102 may be further fixed to the base 1-112 by glue 1-AD (asshown in FIG. 1), and the glue 1-AD can cover the solder at the firstconnecting portion 1-1145 and the second connecting portion 1-1147 toavoid short circuits. In addition, dust can also be prevented fromentering the optical component driving mechanism 1-100.

Please refer to FIG. 8, which is a top view of a partial structure ofthe optical component driving mechanism 1-100 according to an embodimentof the present disclosure. In this embodiment, the base 1-112 has afirst column 1-C1 and a second column 1-C2. The first column 1-C1 isdisposed at the intersection of the first side 1-S1 and the second side1-S2, and the first column 1-C1 is in contact with the circuit assembly1-114. The first column 1-C1 and the second column 1-C2 have differentsizes when viewed in the direction of the optical axis 1-O.Specifically, as shown in FIG. 8, the first column 1-C1 has a radiallength 1-D1, and the second column 1-C2 has a radial length 1-D2. Forplacing the circuit assembly 1-114, the radial length 1-D1 is designedto be shorter than the radial length 1-D2, to reduce the volume of thefirst column 1-C1, and therefore it can achieve the purpose ofminiaturization at the same time.

Furthermore, the base 1-112 may further have a third column 1-C3, thefirst column 1-C1 is in contact with the bent portion 1-1146 of thecircuit assembly 1-114, and the third column 1-C3 is in contact with theouter connecting portion 1-1142 of the circuit assembly 1-114 (thestraight portion). The third column 1-C3 has a receiving recess 1-CC,and a free end 1-114F of the circuit assembly 1-114 is received in thereceiving recess 1-CC to assist in positioning the circuit assembly1-114, to improve the stability of the circuit assembly 1-114 and toachieve the purpose of miniaturization.

In this embodiment, the optical component driving mechanism 1-100 maydefine a first direction 1-A1 and a second direction 1-A2, the firstdirection 1-A1 and the second direction 1-A2 are perpendicular to eachother, and both the first direction 1-A1 and the second direction 1-A2are perpendicular to the optical axis 1-O. When viewed in the firstdirection 1-A1 or the second direction 1-A2, the circuit assembly 1-114partially overlaps the first column 1-C1, the second column 1-C2, andthe third column 1-C3 so as to achieve the purpose of miniaturization.

In addition, as shown in FIG. 7 and FIG. 8, when viewed in the seconddirection 1-A2 (the Y-axis), the outer connecting portion 1-1142 of thecircuit assembly 1-114 (extending along the second direction 1-A2)partially overlaps the driving magnetic element (the first magnet1-M11).

In addition, as shown in FIG. 8, the optical component driving mechanism1-100 may define a center line 1-CL which is perpendicular to theoptical axis 1-O and passes through the center of the holder 1-108. Theholder 1-108 may have one or two protrusions 1-108P. The protrusions1-108P extend in the direction of the center line 1-CL (the Y-axis), thecenter line 1-CL is parallel to the first side 1-S1, and the protrusions1-108P are disposed between the center line and the first side 1-S1 andare closer to the center line 1-CL.

Please refer to FIG. 9, which is a bottom view of a partial structure ofthe optical component driving mechanism 1-100 according to an embodimentof the present disclosure. As shown in FIG. 9, the second elastic member1-110 includes at least one outer connecting portion 1-1101, at leastone inner connecting portion 1-1102, and at least one string 1-1103. Theouter connecting portion 1-1101 is fixedly connected to the fixedassembly (for example, the frame 1-104), the inner connecting portion1-1102 is fixedly connected to the holder 1-108, and the outerconnecting portion 1-1101 is movably connected to the inner connectingportion 1-1102 through the string 1-1103. When viewed in the directionof the optical axis 1-O, the string 1-1103 does not overlap the firstmagnet 1-M11 or the second magnet 1-M12 so as to prevent the string1-1063 from being in contact with the driving magnetic element to causethe problem of short circuit when the optical component drivingmechanism 1-100 operates.

Please refer to FIG. 10, which is a cross-sectional view of the opticalcomponent driving mechanism 1-100 installed on an external circuit board1-150 according to an embodiment of the present disclosure. As shown inFIG. 10, the base 1-112 has a first surface 1-1125 and a second surface1-1126. The first surface 1-1125 and the second surface 1-1126 arelocated on opposite sides of the base 1-112. The first surface 1-1125faces the holder 1-108, a concave portion 1-1127 is formed on the secondsurface 1-1126, and when viewed along the optical axis 1-O, theprojection of the holder 1-108 on the second surface 1-1126 is locatedwithin the concave portion 1-1127.

In addition, as shown in FIG. 10, the optical component drivingmechanism 1-100 may further include a transparent plate 1-120 disposedin the concave portion 1-1127, and the transparent plate 1-120 may be afilter plate. When viewed in a direction perpendicular to the opticalaxis 1-O (the X-axis), the transparent plate 1-120 completely overlapsthe concave portion 1-1127. In addition, a photosensitive element 1-130is disposed on the external circuit board 1-150, and the photosensitiveelement 1-130 is also received in the concave portion 1-1127.

Based on the structural design described above, the photosensitiveelement 1-130 and the transparent plate 1-120 can be accommodated in theconcave portion 1-1127 without providing an additional protective cover,so that the optical component driving mechanism 1-100 can be furtherminiaturized.

The present disclosure provides an optical component driving mechanismhaving a flexible circuit assembly 1-114 configured to be installed onthe base 1-112. The circuit assembly 1-114 is bent into an L shape, andthe outer connecting portion 1-1142 and the inner connecting portion1-1144 of the circuit assembly 1-114 are respectively disposed on thefirst side 1-S1 and the second side 1-S2 of the base 1-112. Based onthis structural configuration, the optical component driving mechanism1-100 can be easily assembled to the external circuit board 1-150 by theouter connecting portion 1-1142.

Furthermore, because the driving magnetic element is disposed on thefirst side 1-S1, and the sensing component 1-116 on the circuit assembly1-114 is disposed on the second side 1-S2, the problem of magneticinterference can be reduced.

Referring to FIGS. 11 and 12, FIG. 11 is a perspective diagram of afirst optical element 2-L1 and a second optical element 2-L2 joined witha driving system in accordance with an embodiment of the invention, andFIG. 12 is a perspective diagram of the driving system in FIG. 11 withthe housings 2-H1 and 2-H2 and the image sensing units 2-Q1 to 2-Q2removed therefrom.

As shown in FIGS. 11 and 12, the driving system in this embodimentprimarily comprises a first module 2-1 and a second module 2-2 arrangedalong the X axis (first direction) for respectively holding and movingthe first and second optical elements 2-L1-2-L2. In this embodiment, thefirst and second modules 2-1 and 2-2 have different thicknesses alongthe Z axis, and two image sensing units 2-Q1 and 2-Q2 are respectivelylocated at the bottom sides of the first and second modules 2-1 and 2-2.The first and second optical elements 2-L1 and 2-L2 may be opticallenses having different focal lengths or optical effective diameters,and they are joined with the first and second modules 2-1 and 2-2 toconstitute a dual camera lens system. The dual camera lens system may bedisposed in handheld digital products such as mobile phones or tabletPCs for photographing or video recording.

For example, the first and second modules 2-1 and 2-2 may comprise avoice coil motor (VCM) for driving the first and second optical elements2-L1 and 2-L2 to move. Thus, auto-focusing (AF) or optical imagestabilizer (OIS) function of the camera lens system can be achieved,wherein the optical axes of the first and second optical elements 2-L1and 2-L2 are parallel to the Z axis.

As shown in FIG. 12, two frames 2-F1 and 2-F2 are respectively disposedin the first and second modules 2-1 and 2-2, and the first and secondoptical elements 2-L1 and 2-L2 are received in the holders 2-LH1 and2-LH2 of the first and second modules 2-1 and 2-2. During assembly, theframes 2-F1 and 2-F2 are respectively adhered to the inner surfaces ofthe housings H1 and H2, and two sheet springs 2-R1 and 2-R2 respectivelyconnect the frames 2-F1 and 2-F2 to the holders 2-LH1 and 2-LH2, wherebythe holders 2-LH1 and 2-LH2 (first and second movable parts) and thefirst and second optical elements 2-L1 and 2-L2 received therein can bedriven to move relative to the frames 2-F1 and 2-F2 and the housings2-H1 and 2-H2 (first and second fixed parts).

Additionally, the first and second modules 2-1 and 2-2 respectively haveat least a first magnetic element 2-M1 and a second magnetic element2-M2 adhered to the frames 2-F1 and 2-F2. In this embodiment, the firstand second magnetic elements 2-M1 and 2-M2 are magnets, and when anexternal circuit applies current signals to the coils (not shown) on theholders 2-LH1 and 2-LH2, an electromagnetic force can be generated bythe coil on the holder 2-LH1 and the first magnetic element 2-M1 formoving the holder 2-LH1 relative to frame 2-F1 and the housing 2-H1, andanother electromagnetic force can be generated by the coil on the holder2-LH2 and the second magnetic element 2-M2 for moving the holder 2-LH2relative to frame 2-F2 and the housing 2-H2. Thus, auto-focusing (AF) oroptical image stabilizer (OIS) function of the camera lens system can beperformed.

Still referring to FIGS. 11 and 12, the first and second modules 2-1 and2-2 respectively comprise a first terminal 2-P1 and a second terminal2-P2. The first terminal 2-P1 is located on a first side 2-S1 of thefirst module 2-1 for electrically connecting the coil on the holder2-LH1 to an external circuit, and the second terminal 2-P2 is located ona second side 2-S2 of the second module 2-2 for electrically connectingthe coil on the holder 2-LH2 to the external circuit.

It should be noted that the first and second terminals 2-P1 and 2-P2 ofthe first and second modules 2-1 and 2-2 are located on the same side ofthe driving system. Thus, the first and second terminals 2-P1 and 2-P2of the first and second modules 2-1 and 2-2 can be electricallyconnected to the external circuit by a single process (e.g. soldering,welding or conductive glue) without rotation of the driving system, soas to increase assembly efficiency and reduce the production cost.

FIG. 13 is a bottom view showing relative position between the first andsecond optical elements 2-L1 and 2-L2, the housings 2-H1 and 2-H2, andthe first and second magnetic elements 2-M1 and 2-M2 in the first andsecond modules 2-1 and 2-2 after assembly. Referring to FIG. 13, atleast one first magnetic element 2-M1 and the coil on the holder 2-LH1of the first module 2-1 can constitute a first driving assembly fordriving the holder 2-LH1 and the first optical element 2-L1 to move bymagnetic force. Similarly, at least one second magnetic element 2-M2 andthe coil on the holder 2-LH2 of the second module 2-2 can constitute asecond driving assembly for driving the holder 2-LH2 and the secondoptical element 2-L2 to move by magnetic force.

In FIG. 13, an L-shaped circuit board 2-C is disposed in the firstmodule 2-1. Moreover, an electronic element 2-C1 and a filter 2-C2 (e.g.capacitor) are disposed on an inner surface of the circuit board 2-C. Inthis embodiment, the electronic element 2-C1 and the filter 2-C2 areboth located on a third side 2-S3 of the first module 2-1.

For example, the electronic element 2-C1 may be a position sensor, aninertial sensor, an integrated circuit or a passive element. In thisembodiment, the electronic element 2-C1 comprises a Hall effect sensorfor detecting the movement of the holder 2-LH1 (first movable part)relative to the housing 2-H1 (first fixed part). Since the mass of thefirst optical element 2-L1 is greater than the mass of the secondoptical element 2-L2, the Hall effect sensor can be disposed in thefirst module 2-1 to facilitate a precise closed-loop control of thefirst optical element 2-L1.

In some embodiments, the electronic element 2-C1 may electricallyconnect to a control circuit (not shown). The control circuit canreceive the signal from the electronic element 2-C1 and transmit twodifferent driving signals to the coils on the holder 2-LH1 and 2-LH2,whereby the holder 2-LH1 and 2-LH2 in the first second modules 2-1 and2-2 can be respectively driven to move relative to the housings 2-H1 and2-H2.

Here, the third side 2-S3 of the first module 2-1 faces a fourth side2-S4 of the second module 2-2, two first magnetic elements 2-M1 aredisposed on the sides of the first module 2-1 other than the third side2-S3, and two second magnetic elements 2-M2 are disposed on the sides ofthe second module 2-2 other than the fourth side 2-S4. Hence, theelectronic element 2-C1 can be positioned between the first and secondoptical elements 2-L1 and 2-L2 to improve space utilization of thedriving system. Moreover, the electronic element 2-C1 can also beprevented from magnetic interference by the first and second magneticelements 2-M1 and 2-M2 or other electronic components outside thedriving system.

FIG. 14 is a side view of the first and second optical elements 2-L1 and2-L2 joined with a driving system in accordance with another embodimentof the invention. As shown in FIG. 14, an electronic element 2-C3 isdisposed on and electrically connected to the image sensing unit 2-Q1under the first module 2-1. When viewed along a horizontal direction (Ydirection), the electronic element 2-C3 does not overlap the first andsecond modules 2-1 and 2-2.

Additionally, when viewed along a vertical direction (Z direction), theelectronic element 2-C3 partially overlaps the first module 2-1 or thesecond module 2-2, so as to improve space utilization under the firstmodule 2-1 or the second module 2-2 and facilitate miniaturization ofthe driving system. It should be noted that the vertical direction isparallel to the optical axes of the first and second optical elements2-L1 and 2-L2. For example, the electronic element 2-C3 may be aposition sensor (e.g. Hall effect sensor), an inertial sensor, anintegrated circuit or a passive element.

FIG. 15 shows a first optical element 2-L1, a second optical element2-L2 and a third optical element 2-L3 joined with a driving system inaccordance with another embodiment of the invention. FIG. 15 isdifferent from the embodiment of FIG. 11 in that the driving systemfurther comprises a third module 2-3 for holding and moving a thirdoptical element 2-L3. In this embodiment, the first, second and thirdmodules 2-1 to 2-3 are arranged along the X axis (first direction), andthe optical effective diameter of the second optical element 2-L2 isgreater than the optical effective diameter of the third optical element2-L3.

As shown in FIG. 15, the third module 2-3 has a housing 2-H3 and aholder 2-LH3 for holding the third optical element 2-L3, and an imagesensing unit 2-Q3 is disposed under the housing 2-H3. The holder 2-LH3may be connected to the housing 2-H3 via sheet springs, so that theholder 2-LH3 and the third optical element 2-L3 can move relative to thehousing 2-H3. Moreover, at least a third magnetic element 2-M3 isdisposed in the housing 2-H3 of third module 2-3 (FIG. 16). The thirdmagnetic element 2-M3 and a coil (not shown) disposed on the holder2-LH3 can constitute a third driving assembly for driving the holder2-LH3 and the third optical element 2-L3 to move relative to the housing2-H3.

When the external circuit applies a current signal to the coil on theholders 2-LH3, an electromagnetic force can be generated by the coil andthe third magnetic element 2-M3 to move the holder 2-LH3 (third movablepart) relative to the housing 2-H3 (third fixed part), wherebyauto-focusing (AF) or optical image stabilizer (OIS) function for thethird optical element 2-L3 can be performed.

In this embodiment, at least a first terminal 2-P1 is provided on alateral side of the first module 2-1, at least a second terminal 2-P2 isprovided on a lateral side of the second module 2-2, and at least athird terminal 2-P3 provided on a lateral side of the third module 2-3.Since the first, second and third terminals 2-P1 to 2-P3 are located onthe same side of the driving system, they can be electrically connectedto the external circuit by a single process (e.g. soldering, welding orconductive glue) without rotation of the driving system, so as toincrease assembly efficiency and reduce the production cost.

FIG. 16 shows the arrangement of the first, second and third magneticelements 2-M1 to 2-M3 in the first, second and third modules 2-1 to 2-3after assembly. As shown in FIG. 16, a third side 2-S3 of the firstmodule 2-1 faces a fourth side 2-S4 of the second module 2-2, and afifth side 2-S5 of the third module 2-3 faces a sixth side 2-S6 of thesecond module 2-2. Here, the fifth side 2-S5 of the third module 2-3 isparallel to the third side 2-S3 of the first module 2-1.

In this embodiment, a circuit board 2-C is disposed on the third side2-S3 of the first module 2-1, wherein an electronic element 2-C1 and afilter 2-C2 (e.g. capacitor) are disposed on an inner surface of thecircuit board 2-C. Specifically, two first magnetic elements 2-M1 aredisposed on the sides of the first module 2-1 other than the third side2-S3, so that the electronic element 2-C1 can also be prevented frommagnetic interference by the first magnetic elements 2-M1.

Similarly, two second magnetic elements 2-M2 are disposed on the sidesof the second module 2-2 other than the fourth side 2-S4. Thus, theelectronic element 2-C1 can also be prevented from magnetic interferenceby the second magnetic elements 2-M2.

In FIG. 16, since there is no magnetic element disposed on the sixthside 2-S6 of the second module 2-2, the third magnetic elements 2-M3 canbe disposed on any side of the third module 2-3 (including the fifthside 2-S5). In this embodiment, four third magnetic elements 2-M3 areprovided on all the four sides of the third module 2-3, therebyincreasing the electromagnetic driving force for moving the holder 2-LH3and the third optical element 2-L3.

FIG. 17 shows the arrangement of the first, second and third magneticelements 2-M1 to 2-M3 in the first, second and third modules 2-1 to 2-3after assembly, in accordance with another embodiment of the invention.FIG. 17 is different from the embodiment of FIG. 11 in that the firstmodule 2-1 is arranged between the second and third modules 2-2 and 2-3.Here, the electronic element 2-C1, the filter 2-C2 and the circuit board2-C are disposed on the third side 2-S3 of the first module 2-1, whereinthe third side 2-S3 faces the fourth side 2-S4 of the second module 2-2.

As shown in FIG. 17, since the first magnetic elements 2-M1 are notdisposed on the third side 2-S3 of the first module 2-1, and the secondmagnetic elements 2-M2 are not disposed on the fourth side 2-S4 of thesecond module 2-2, the circuit board 2-C can be prevented from magneticinterference by the first and second magnetic elements 2-M1 and 2-M2.Moreover, one of the third magnetic elements 2-M3 can be disposed on thefifth side 2-S5 that faces the first module 2-1 without magneticinterference from the first magnetic elements 2-M1.

FIG. 18 shows a side view of a first optical element 2-L1, a secondoptical element 2-L2 and a third optical element 2-L3 joined with adriving system in accordance with another embodiment of the invention,wherein at least an electronic element 2-E is disposed between the firstand second optical elements 2-L1 and 2-L2 or between the second andthird optical elements 2-L2 and 2-L3, so as to improve space utilizationof the camera lens system.

In this embodiment, the electronic element 2-E at least partiallyoverlaps the first optical element 2-L1, the second optical element 2-L2or a third optical element 2-L3 when viewed along the X axis (firstdirection). For example, the electronic element 2-E may be a positionsensor (e.g. Hall effect sensor), an inertial sensor, an integratedcircuit, a light emitting element (e.g. flash light) or a passiveelement.

The image sensing units 2-Q1 to 2-Q3 are respectively affixed to thebottoms of the housings 2-H1 to 2-H3, corresponding to the first, secondand third optical elements 2-L1 to 2-L3. In FIG. 18, the end surfaces2-A1 to 2-A3 of the optical elements 2-L1 to 2-L3 respectively protrudefrom the top surfaces 2-H11 to 2-H31 of the housings 2-H1 to 2-H3, andare located at substantially the same height along the Z axis (verticaldirection). In this embodiment, the end surfaces 2-A1 to 2-A3 have aheight difference less than 0.5 mm along the Z axis.

Still referring to FIG. 18, the optical elements 2-L1 to 2-L3 havedifferent lengths 2-T1, 2-T2 and 2-T3 along the Z axis, and the imagesensing units 2-Q1 to 2-Q3 under the housings 2-H1 to 2-H3 are atdifferent heights along the Z axis. With the end surfaces 2-A1 to 2-A3of the optical elements 2-L1 to 2-L3 aligned to each other atsubstantially the same height along the Z axis, aberration of the cameralens system can be efficiently reduced.

Moreover, FIG. 18 also shows that the top surfaces 2-H11 to 2-H31 of thehousings 2-H1 to 2-H3 are at different heights along the Z axis. In FIG.18, a first distance 2-d 1 is formed between the end surface 2-A1 of thefirst optical element 2-L1 and the top surface 2-H11 of the first module2-1, a second distance 2-d 2 is formed between the end surface 2-A2 ofthe second optical element 2-L2 and the top surface 2-H21 of the secondmodule 2-2, and a third distance 2-d 3 is formed between the end surface2-A3 of the third optical element 2-L3 and the top surface 2-H31 of thethird module 2-3, wherein 2-d 2<2-d 1<2-d 3.

FIG. 19 is a perspective diagram of a chassis 2-B surrounding the first,second and third modules 2-1 to 2-3 and the first, second and thirdoptical elements 2-L1 to 2-L3, in accordance with another embodiment ofthe invention, and FIG. 20 is a perspective diagram of the chassis 2-Bin FIG. 19.

As shown in FIG. 19, the first, second and third modules 2-1 to 2-3 arearranged in an L-shaped manner. Specifically, a chassis 2-B forms afirst frame body surrounding the first module 2-1, a second frame bodysurrounding the second module 2-2, and a third frame body surroundingthe third module 2-3. Moreover, a first gap 2-B1 is formed between thefirst frame body and the first module 2-1, a second gap 2-B2 is formedbetween the second frame body and the second module 2-2, and a third gap2-B3 is formed between the third frame body and the third module 2-3.

During assembly, the first, second and third modules 2-1 to 2-3 arerespectively placed in the first, second and third frame bodies of thechassis 2-B, and the image sensing surfaces of the three image sensingunits 2-Q1 to 2-Q3 are then calibrated to be parallel to each other.Subsequently, the glue can be applied to the first, second and thirdgaps 2-B1 to 2-B3, so that the first, second and third modules 2-1 to2-3 can be firmly affixed in the chassis 2-B, thereby ensuring thequality of the images captured by the three image sensing units 2-Q1 to2-Q3.

FIG. 21 is a top view showing relative positions of the magneticelements 2-M1 to 2-M3, the circuit board 2-C in the first, second andthird modules 2-1 to 2-3 and the chassis 2-B of FIG. 20 after assembly.Referring to FIGS. 20 and 21, a plurality of protrusions 2-BP are formedon the inner surfaces of the chassis 2-B and extend toward the first,second and third modules 2-1 to 2-3. During assembly, the protrusions2-BP may contact the first, second and third modules 2-1 to 2-3 tofacilitate positioning of the first, second and third modules 2-1 to 2-3inside the chassis 2-B.

In this embodiment, an electronic element 2-C1 and a filter 2-C2 (e.g.capacitor) are disposed on a circuit board 2-C in the first module 2-1.The electronic element 2-C1 may be a position sensor for detecting themovement of the holder 2-LH1 (first movable part) relative to thehousing 2-H1 (first fixed part).

Specifically, when viewed along a protruding direction of the protrusion2-BP that extends toward the circuit board 2-C, neither the electronicelement 2-C1 nor the filter 2-C2 overlap the edge of the protrusion 2-BPthat is parallel to the protruding direction (X direction).

FIG. 21 further shows that the third side 2-S3 of the first module 2-1faces the fourth side 2-S4 of the second module 2-2, and the fifth side2-S5 of the third module 2-3 faces the sixth side 2-S6 of the secondmodule 2-2. Here, the electronic element 2-C1, the filter 2-C2 and thecircuit board 2-C are disposed on a side of the first module 2-1 faraway from the second module 2-2. It should be noted that the first andsecond terminals 2-P1 and 2-P2 shown in FIG. 11 are respectivelyprovided on the first side 2-S1 of the first module 2-1 and the secondside 2-S2 of the second module 2-2, wherein the fifth side 2-S5 isparallel to the first side 2-S1 and the second side 2-S2.

As one of the third magnetic elements 2-M3 is disposed on the fifth side2-S5 of the third module 2-3, the second magnetic elements 2-M2 arepreferably disposed on the sides of the second module 2-2 other than thesixth side 2-S6 (e.g. fourth side 2-S4), so as to prevent magneticinterference between the second and third magnetic elements 2-M2 and2-M3.

In the aforementioned embodiments of FIGS. 15 to 21, one of the first,second and third modules 2-1 to 2-3 may be omitted to form a dual cameralens system. In some embodiments, the first, second and third modules2-1 to 2-3 may also be linearly arranged along an axis and affixed inthe chassis 2-B.

Referring to FIG. 22, in an embodiment of the invention, the opticalmember driving mechanism 3-10 can be disposed in an electronic device3-20 and used to hold and drive a lens 3-30, so that the lens 3-30 canmove relative to an image sensor (not shown) in the electronic device3-20, and the purpose of focus adjustment can be achieved. For example,the electronic device 3-20 can be a digital camera or a smart phonehaving the function of capturing photographs or making video recordings,and the optical member 3-30 can be a lens. The optical axis 3-O of theoptical member 3-30 is substantially parallel to the Z-axis in thedrawing, and perpendicular to the image sensor in the electronic device3-20.

FIG. 23 is a schematic diagram of the optical member driving mechanism3-10, FIG. 24 is an exploded-view diagram of the optical member drivingmechanism 3-10, and FIG. 25 is a cross-sectional view along the line3-A-3-A in FIG. 23. As shown in FIGS. 23-25, the optical member drivingmechanism 3-10 primarily includes a fixed portion 3-100, a movableportion 3-200, a first elastic member 3-300, a second elastic member3-400, a driving assembly 3-500, a control module 3-600, and an inertiadetecting member 3-700.

The fixed portion 3-100 includes a case 3-110, a base 3-120, and a frame3-130. The frame 3-130 is affixed to the base 3-120, and the case 3-110and the base 3-120 can be assembled and form a hollow box. The frame3-130, the movable portion 3-200, the first elastic member 3-300, thesecond elastic member 3-400, the driving assembly 3-500, the controlmodule 3-600, and the inertia detecting member 3-700 can be accommodatedin the hollow box.

The movable portion 3-200 includes an optical member holder 3-210. Anaccommodating hole 3-220 is formed on the center of the optical memberholder 3-210, and the optical member 3-30 can be fixedly disposed in theaccommodating hole 3-220. The case 3-110 and the base 3-120 of the fixedportion 3-100 respectively has an optical hole 3-01 and an optical hole3-02 corresponding to the accommodating hole 3-220. Thus, an externallight can move from the light-entering side 3-11 of the optical drivingmechanism 3-10 through the optical hole 3-01, the optical member 3-30,and the optical hole 3-02 in sequence to the light-emitting side 3-12 ofthe optical driving mechanism 3-10, and reach the image sensor in theelectronic device 3-20, so as to form an image on the image sensor.

The first elastic member 3-300 and the second elastic member 3-400 arerespectively disposed on opposite sides of the optical member holder3-210. An inner section 3-310 and an outer section 3-320 of the firstelastic member 3-300 are respectively connected to the upper surface ofthe optical member holder 3-210 and the frame 3-130, and an innersection 3-410 and an outer section 3-420 of the second elastic member3-400 are respectively connected to the lower surface of the opticalmember holder 3-210 and the base 3-120. Therefore, the optical memberholder 3-210 can be hung in the hollow box by the first elastic member3-400 and the second elastic member 3-500.

The driving assembly 3-500 includes at least one first electromagneticdriving member 3-510 and at least one second electromagnetic drivingmember 3-520. The first electromagnetic driving member 3-510 is disposedon the optical member holder 3-210, and the second electromagneticdriving member 3-520 is disposed on the base 3-120 or the frame 3-130 ofthe fixed portion 3-100. The electromagnetic effect between the firstelectromagnetic driving member 3-510 and the second electromagneticdriving member 3-520 can drive the optical member holder 3-210 and theoptical member 3-30 disposed thereon to move relative to the firstmodule 3-100 along the Z-axis (the optical axis 3-O of the opticalmember 3-30) within a range of motion.

For example, the first electromagnetic driving member 3-510 can be acoil module, and the second electromagnetic driving member 3-520 can bea magnetic member (such as a magnet). When a current flows through thecoil module (the first electromagnetic driving member 3-510), anelectromagnetic effect is generated between the coil module and themagnetic member, and provides a driving force along the Z-axis on theoptical member holder 3-210. Therefore, the optical member holder 3-210and the optical member 3-30 disposed thereon can move along the Z-axisrelative to the fixed module 3-100 and the image sensor in theelectronic device 3-20. The purpose of focus adjustment can be achieved.

In some embodiments, the first electromagnetic driving member 3-510 canbe a magnetic member, and the second electromagnetic driving member3-520 can be a coil module.

It should be noted that, when the driving assembly 3-500 does notprovide the driving force, the optical member holder 3-210 is hung in apredetermined position by the first elastic member 3-300 and the secondelastic member 3-400, a gap 3-D1 is formed between the optical memberholder 3-210 and the top wall 3-111 of the case 3-110, and a gap 3-D2 isformed between the optical member holder 3-210 and the base 3-120. Sincethere is no component disposed in the gaps 3-D1 and 3-D2, the gap 3-D1is the maximum distance that the optical member holder 3-210 can movetoward the light-entering side 3-11 (hereinafter referred to as a firstlimit moving range), and the gap 3-D2 is the maximum distance that theoptical member holder 3-210 can move toward the light-emitting side 3-12(hereinafter referred to as a second limit moving range). The range ofmotion of the optical member holder 3-210 is the sum of the first limitmoving range and the second limit moving range.

In this embodiment, the first limit moving range is greater than thesecond limit moving range. The ratio of the first limit moving range tothe second limit moving range is greater than or equal to 1.5, and thesecond limit moving range is 10 μm-100 μm (such as 10 μm-50 μm). Sincethe optical member holder 3-210 is hung in a frequently used focusingposition (for example, a focusing position of photographing portrait),in most instances, the driving assembly 3-500 only needs to drive theoptical member holder 3-210 to move slightly, and the purpose of savingpower can be efficiently achieved.

Referring to FIG. 24, the control module 3-600 is electrically connectedto the driving assembly 3-500, so as to transmit a driving signal groupto the driving assembly 3-500 and control the magnitude of driving forceapplied on the movable portion 3-200 from the driving assembly 3-500.The specific control method is discussed below.

When the user desires to move the optical member holder 3-210 from thepredetermined position to a target position, the control module 3-600can first transmit a main signal in the driving signal group to thedriving assembly 3-500. When the driving assembly 3-500 receives theaforementioned main signal, it can provide the driving force to theoptical member holder 3-210 to move the optical member holder 3-210 tothe target position.

As shown in FIG. 26, when the optical member holder 3-210 is driven andreaches the target position, it may not stop immediately due to inertiaor other factors, and moves beyond the target position (“0” indicatesthe target position). The optical member holder 3-210 naturallyoscillates, and a steady state can only be reached after passing throughthe target position several times.

Therefore, as shown in FIG. 27, after transmitting the main signal, thecontrol module 3-600 provides a steady signal to the driving assembly3-500, and the driving assembly 3-500 provides a reverse driving forceto offset the natural oscillation. In order to enable the optical memberholder 3-210 to reach the steady state rapidly and prevent generating areverse oscillation, the frequency of the waveform of the reversedriving force is substantially the same as the frequency of the naturaloscillation, and the reverse driving force decays over time.

The magnitude and the duration of the reverse driving force aredetermined according to weight of the movable portion 3-200, the elasticcoefficient of the first elastic member 3-300, the elastic coefficientof the second elastic member 3-400, and the gravity state of the opticaldriving mechanism 3-10. In particular, the amplitude and the duration ofthe natural oscillation can be measured by an external apparatus, andthe driving assembly 3-500 can provide the appropriate reverse drivingforce according to the measuring result.

As shown in FIG. 28, owing to the input of the reverse driving force,the optical member holder 3-210 can rapidly reach the steady state in apredetermined time and stop at the target position. The predeterminedtime is determined according to the decline phase of the naturaloscillation.

After the optical member holder 3-210 reaches the steady state, there isno need to provide the reverse driving force. Therefore, the controlmodule 3-600 stops inputting the steady signal to the driving assembly3-500 after the predetermined time. In contrast, for maintaining theoptical member holder 3-210 at the target position, the main signal iscontinually input to the driving assembly 3-500. In other words, theduration for inputting the main signal is greater than that forinputting the steady signal.

Referring to FIG. 24, in this embodiment, the inertia detecting member3-700 is electrically connected to the control module 3-600, andconfigured to measure the gravity data of the optical member drivingmechanism 3-10. In particular, when the disposing orientation of theelectronic device 3-20 is different (for example, the light-enteringside 3-11 faces the ground or the light-emitting side 3-12 faces theground), or the electronic device 3-20 is impacted by an external force,the gravity of the optical member driving mechanism is affected. Thecontrol module 3-600 can input a compensating signal according to thegravity data measured by the inertia detecting member 3-700 and theweight data of the movable portion 3-200, so as to adjust the requiredreverse driving force in different gravity state.

Referring to FIGS. 29-31, in another embodiment, the optical drivingmechanism 3-10 further includes at least one vibration absorption member3-800 disposed between the optical member holder 3-210 and the case3-110 and contact with both, or disposed between the optical memberholder 3-210 and the frame 3-130 and contact with both. The vibrationabsorption member 3-800 can be a damping member configured to reduce thenatural oscillation of the movable portion 3-200, and the movement ofthe movable portion 3-200 can be smoother.

After adding the vibration absorption member 3-800, the naturaloscillation of the movable portion may become underdamped type,overdamped type, or critically damped type. However, no matter whichtype it is, the control module 3-600 can input the main signal and thesteady signal to the driving assembly 3-500 to speed up the movableportion 3-200 to reach the steady state.

In some embodiments, the vibration absorption member 3-800 can bedisposed between the optical member holder 3-210 and the first elasticmember 3-300 and contact with both, disposed between the optical memberholder 3-210 and the second elastic member 3-400 and contact with both,disposed between the fixed portion 3-100 and the first elastic member3-300 and contact with both, or disposed between the fixed portion 3-100and the second elastic member 3-400 and contact with both.

In summary, an optical member driving mechanism for driving an opticalmember having an optical axis is provided, including a fixed portion, amovable portion, a first elastic member, and a driving assembly. Themovable portion is configured to hold the optical member, and is movablyconnected the fixed portion via the first elastic member. The drivingassembly drives the movable portion to move along the optical axiswithin a range of motion. The range of motion includes a first limitmoving range and a second limit moving range. The first limit movingrange is the maximum distance that the movable portion can move towardthe light-entering side, and the second limit moving range is themaximum distance that the movable portion can move toward thelight-emitting side. When the movable portion is in a predeterminedposition relative to the fixed portion, the first limit moving range isgreater than the second limit moving range.

Refer to FIG. 32 and FIG. 33. FIG. 32 shows a perspective view of anoptical module in accordance with an embodiment of this disclosure, andFIG. 33 shows an exploded view of an optical module in accordance withan embodiment of FIG. 32. As shown in FIG. 32 and FIG. 33, in thepresent embodiment, an optical module 4-1 has a first side 4-S1extending along an X direction, and a second side 4-S2 extending along adirection (Y direction) different from the first side 4-S1. The opticalmodule 4-1 mainly includes a movable portion 4-100, a fixed portion4-200, a driving portion 4-300, a position-sensing portion 4-400, acircuit board 4-500, a first flexible element 4-600, and a secondflexible element 4-700.

The movable portion 4-100 includes a holder 4-110, and the holder 4-110has a through hole 4-111 and a plurality of protruding legs 4-112. Theholder 4-110 is movable relative to the fixed portion 4-200 and isconfigured to hold an optical element 4-120, such as a lens in thisembodiment, and the optical element 4-120 has an optical axis 4-O. Itshould be noted that in other embodiments, the elements in the fixedportion may also be adjusted to be the movable portion according toneeds.

Refer to FIG. 33, FIG. 34 and FIG. 35. FIG. 34 shows a schematic view ofa circuit component embedded in a base in accordance with an embodimentof this disclosure, and FIG. 35 shows a perspective view of a circuitcomponent in accordance with an embodiment of this disclosure. As shownin FIG. 33, the fixed portion 4-200 includes a base 4-210, a circuitcomponent 4-220, a case 4-230, and a frame 4-240. The base 4-210 has abase opening 4-211 and a plurality of stop recesses 4-212. As shown inFIG. 34, in the present embodiment, the circuit component 4-220 isembedded in the base 4-210. As shown in FIG. 35, the circuit component4-220 has an external electrical connection portion 4-221, an internalelectrical connection portion 4-222, a driving electrical connectionportion 4-223, and a recessed portion 4-224 that is recessed tocorrespond with the stop recess 4-212. The external electricalconnection portion 4-221 and the internal electrical connection portion4-222 have a plurality of terminals 4-C respectively.

Refer to FIG. 36 and FIG. 37, which show a schematic view of a partialstructure of an optical module in accordance with an embodiment of thisdisclosure. The holder 4-110 has four protruding legs 4-112 on the sideclose to the base 4-210, and four stop recesses 4-212 are disposed onthe base 4-210 to correspond to the protruding legs 4-112. The stoprecesses 4-212 are used to stop the holder 4-110. If the protruding legs4-112 touch the stop recesses 4-212 when the holder 4-110 is moved, theholder 4-110 will be stopped. Therefore, the stop recesses 4-212 preventthe movable portion 4-100 from exceeding the range of motion. Aconventional method of stopping the movable portion is to form aprotruding structure on the base. Unlike the conventional method, themethod of stopping the movable portion in this embodiment is by forminga recessed structure (the stop recesses 4-212) on the base 4-210. Thus,the range of motion of the movable portion 4-100 in a direction parallelto the optical axis 4-O is greater, and miniaturization of the opticalmodule may also be achieved.

Refer to FIG. 38, which shows a schematic view of a partial structure ofan optical module in accordance with an embodiment of this disclosure.The base 4-210 has stop recesses 4-212. In the direction parallel to theoptical axis 4-O, if the height of the circuit component 4-220 embeddedin the base 4-210 are all the same no matter whether a portion of thecircuit component 4-220 overlaps the stop recesses 4-212 or not whenviewed along the direction parallel to the optical axis 4-O, it will bedifficult to manufacture the base 4-210. Since the distance 4-D betweenthe circuit component 4-220 and the stopper recesses 4-212 is too small(in other words, because a thickness (distance 4-D) of a part of thebase 4-210 is too thin), it will be difficult to manufacture this partof the base 4-210 using a general plastic mold. Therefore, in thisembodiment, the circuit component 4-220 has the recessed portion 4-224,and the recessed portion 4-224 recess correspondingly with the stoprecesses 4-212 in the direction parallel to the optical axis 4-O. Hence,the process limitation of the base 4-210 may be overcome.

Back to FIG. 33. The case 4-230 has a case opening 4-231, a top wall4-232, and four side walls 4-233 extending along the optical axis 4-Ofrom an edge of the top wall 4-232. The case 4-230 and the base 4-210may be combined to form a housing of the optical module 4-1. It shouldbe understood that the center of the case opening 4-231 corresponds tothe optical axis 4-O of the optical element 4-120, and a base opening4-211 corresponds to an image-sensing element (not shown in the figures)disposed outside the optical module 4-1. External light may enter thecase 4-230 through the case opening 4-231, and is received by theimage-sensing element (not shown in the figures) after passing throughthe optical element 4-120 and the base opening 4-211, so as to generatea digital image signal.

The frame 4-240 has a frame opening 4-241, a plurality of pillars 4-242extending along the optical axis 4-O, and a plurality of receiving holes4-243. In this embodiment, the holder 4-110 and the optical element4-120 inside the holder 4-110 are movably disposed in the frame 4-240.More specifically, the holder 4-110 may be suspended in the center ofthe frame 4-240 by the first flexible element 4-600 and the secondflexible element 4-700, and materials of the first flexible element4-600 and the second flexible element 4-700 may be metal.

The driving portion 4-300 includes a driving magnetic element 4-310 anda driving coil 4-320, wherein the driving portion 4-300 may be fixed tothe frame 4-240 or movable relative to the frame 4-240. It should beunderstood that a magnetic force may be generated by the interactionbetween the driving magnetic element 4-310 and the driving coil 4-320 tomove the holder 4-110 relative to the frame 4-240 along the optical axis4-O, thereby achieving fast focusing.

The position-sensing portion 4-400 includes a position-sensing element4-410 and an electronic element 4-420, and the position-sensing portion4-400 is disposed on the circuit board 4-500 and located between thecircuit board 4-500 and the movable portion 4-100 (the holder 4-110).The position-sensing element 4-410 is used to sense the position of themovable portion 4-100 relative to the fixed portion 4-200. Specifically,the position-sensing element 4-410 may be, for example, Hall effectsensors, MR sensors, or a Fluxgate sensor or the like. Theposition-sensing element 4-410 is disposed to sense a magnetic field ofa magnetic element (not shown in the figures) on the holder 4-110, andobtain the position of the holder 4-110 relative to the base 4-210. Theelectronic element 4-420 may be a signal filter or a driver IC.

Refer to FIG. 39 to FIG. 41. FIG. 39 shows a perspective view of acircuit board in accordance with an embodiment of this disclosure, FIG.40 shows a cross-sectional view of an optical module along line 4-A-4-A′in FIG. 32, and FIG. 41 shows a schematic view of a partial structure ofan optical module in accordance with an embodiment of this disclosure.As shown in FIG. 39, the circuit board 4-500 has a first surface 4-P1,and the first surface 4-P1 has two grooves 4-510, and the groove 4-510may be used to dispose the position-sensing element 4-410 or theelectronic element 4-420. The groove 4-510 has four side surfaces 4-511,and the side surfaces 4-511 are non-parallel to the first surface 4-P1and face the position-sensing element 4-410 or the electronic element4-420 disposed in the grooves 4-510. A part of the position-sensingelement 4-410 or the electronic element 4-420 disposed in the grooves4-510 is surrounded by the four side surfaces 4-511. Therefore, as shownin FIG. 40, the circuit board 4-500 and the position-sensing element4-410 partially overlap when viewed along a direction perpendicular tothe optical axis 4-O.

As shown in FIG. 40, the circuit board 4-500 is disposed between theside wall 4-233 of the case 4-230 and the pillars 4-242 of the frame4-240. When viewed along a direction perpendicular to the optical axis4-O, the pillars 4-242, the side wall 4-233, and the circuit board 4-500partially overlap. As shown in FIG. 41, the position-sensing element4-410 is partially disposed in the grooves 4-510 of the circuit board4-500, and received in the receiving holes 4-243 of the frame 4-240.Moreover, the pillars 4-242 of the frame 4-240 are closer to the movableportion 4-100 (as shown in FIG. 40) than the position-sensing portion4-400. With such an arrangement, the position-sensing element 4-410 andthe electronic element 4-420 disposed in the grooves 4-510 arerelatively stable when suffering an impact of an external force.Moreover, the pillars 4-242 of the frame 4-240 may restrict the movementof the movable portion 4-100, and prevent the position-sensing element4-410 or the electronic element 4-420 from being directly damaged by theimpact of the movable portion 4-100.

Refer to FIG. 42 to FIG. 44. FIG. 42 shows a perspective view of apartial structure of an optical module which cut along line 4-B-4-B′ inFIG. 32, FIG. 43 shows a top view of a partial structure of an opticalmodule in accordance with an embodiment of this disclosure, and FIG. 44shows a schematic view of a partial structure of an optical module inaccordance with an embodiment of this disclosure. As shown in FIG. 42,the driving electrical connection portion 4-223 of the circuit component4-220 is located at the first side 4-S1 of the optical module 4-1. Thedriving electrical connection portion 4-223 is closer to the holder4-110 than the internal electrical connection portion 4-222 when viewedalong the direction parallel to the optical axis 4-O. The drivingelectrical connection portion 4-223 is connected to the second flexibleelement 4-700. The driving electrical connection portion 4-223 extendsalong the circuit component 4-220 embedded in the base 4-210 to one ofthe terminals 4-C of the internal electrical connection portion 4-222(as shown in FIG. 34). By electrically connecting, if theposition-sensing portion 4-400 on the circuit board 4-500 senses thedisplacement of the movable portion 4-100 relative to the fixed portion4-200, the circuit board 4-500 may generate and provide an electricalsignal to the driving coil 4-320. The electrical signal is transmittedfrom the circuit board 4-500 to the second flexible element 4-700 viathe circuit component 4-220, and then from the second flexible element4-700 to the driving coil 4-320. Then, an electromagnetic driving forceis generated between the driving coil 4-320 and the driving magneticelement 4-310. The electromagnetic driving force is used to drive theframe 4-240 to move in a direction perpendicular to the optical axis 4-O(in a direction parallel to the XY plane), so that the positiondisplacement may be compensated for, and further achieve the function ofOptical Image Stabilization (OIS).

As described above, the driving electrical connection portion 4-223 andthe circuit board 4-500 are both disposed on the first side 4-51 of theoptical module 4-1. In addition to simplifying the circuit, as shown inFIG. 43, the driving coil 4-320 disposed on different sides (differentfrom the first side 4-51) may be designed to be longer, and furtherenhance the electromagnetic driving force. Moreover, when viewed along adirection perpendicular to the optical axis 4-O, as shown in FIG. 44,the position-sensing element 4-410 does not overlap the drivingelectrical connection portion 4-223, and the driving electricalconnection portion 4-233 is disposed in a space below theposition-sensing element 4-410. As a result, the space inside theoptical module 4-1 may be used efficiently, thereby achieving moduleminiaturization.

Refer to FIG. 45 and FIG. 46. FIG. 45 shows a schematic view of apartial structure of an optical module in accordance with an embodimentof this disclosure, and FIG. 46 shows a schematic view of a structure ofa dual optical module using an optical module according to an embodimentof this disclosure. As shown in FIG. 45, the circuit board 4-500 has adentate structure 4-520, and the circuit board 4-500 is disposed on thefirst side 4-S1 of the optical module 4-1. The dentate structure 4-520is configured to receive the internal electrical connection portion4-222 of the circuit component 4-220, such that the circuit board 4-500and the internal electrical connection portion 4-222 may be relativelystable in the subsequent connection and fix.

The internal electrical connection portion 4-222 disposed on the firstside 4-S1 of the optical module 4-1 has six terminals 4-C, wherein fourof the six terminals 4-C extend along the circuit component 4-220embedded in the base 4-210 to the external electrical connection portion4-221 disposed on the second side 4-S2 of the optical module 4-1, andthe shape of the circuit component 4-220 embedded in the base 4-210 iscorresponded with the shape of the base 4-210 (as shown in FIG. 34). Itshould be understood that number of the terminals is merely an exampleand not a limitation, and may be increased or decreased as required.Conventionally, when the circuit board is electrically connected tooutside of the optical module, the circuit board is generally extendedthrough the base to simultaneously serve as an external electricalconnection portion. In contrast, in this embodiment, the circuit board4-500 is connected to the internal electrical connection portion 4-222disposed in the same side (the first side 4-S1) of the optical module,and further connected to the external electrical connection portion4-221 disposed on the second side 4-S2. With the manner of connectiondescribed above, the structure of the base 4-210 may be strengthened byextending the circuit component 4-220 in the base 4-210. Moreover, thecircuit board 4-500 does not need to pass through the base 4-210 whenthe circuit board 4-500 is electrically connected to the outside of theoptical module. In other words, the base 4-210 does not need a spaceinto which the circuit board 4-500 can be extended and inserted.Therefore, on the first side 4-S1 of the optical module, the width ofthe base 4-210 may be smaller than the conventional one.

Additionally, the external electrical connection portion 4-221 disposedon the second side 4-S2 is configured in a space below the drivingmagnetic element 4-310. Thus, on the second side 4-S2 of the opticalmodule, the width of the base 4-210 may not be increased. As shown inFIG. 45, when viewed along the direction parallel to the optical axis4-O, the external electrical connection portion 4-221 and the drivingmagnetic element 4-310 partially overlap, thereby achieving moduleminiaturization.

In addition, the subsequent assembly production efficiency may beimproved by disposing the circuit board 4-500 and the externalelectrical connection portion 4-221 on different sides. For example, iftwo conventional optical modules are combined to be a dual opticalmodule, the two optical modules must be assembled in the oppositedirection to prevent magnetic interference. That is, the side of oneoptical module disposed the external electrical connection portion facesto one direction, and the side of the other optical module disposed theexternal electrical connection portion faces to another direction whichis 180 degrees different from one module. Magnetic interference occurswhen magnetic elements of the two optical modules are too close, and thefocus speed and accuracy of the lens may be affected. Since the externalelectrical connection portions of the two optical modules are indifferent sides, subsequent assembly soldering needs to be performed instages. However, as shown in FIG. 46, in this embodiment, when twooptical modules 4-1 are combined to a dual optical module, the twooptical modules 4-1 may be assembled in the same direction. That is, thesides of two optical modules disposed the external electrical connectionportion may be faced to the same direction, and the magneticinterference caused by the magnetic elements being too close may beavoided. Moreover, the external electrical connection portions 4-221 ofthe two optical modules 4-1 are in the same direction, the subsequentassembly soldering may be performed at the same time.

Refer to FIG. 47 and FIG. 48, which show a schematic view of an opticalmodule in accordance with an embodiment of this disclosure. As shown inFIG. 47, the optical module of the present embodiment further includes asoldering portion 4-800. The soldering portion 4-800 is used to affixthe circuit board 4-500 to the internal electrical connection portion4-222. As shown in FIG. 48, after the circuit board 4-500 and theinternal electrical connection portion 4-222 are fixed by the solderingportion 4-800, the soldering portion 4-800 is covered by an adhesiveelement 4-900. The adhesive element 4-900 may prevent the solderingportion 4-800 from being short, and block external dust entering theinterior of the module and keep the interior of the module clean.

FIG. 49 is a perspective view of an optical module in some embodimentsof the present disclosure, FIG. 50 is an exploded view of the opticalmodule in FIG. 49, and FIG. 51 is a cross-sectional view illustratedalong line 5-A-5-A′ in FIG. 49. As shown in FIGS. 49 to 51, the opticalmodule 5-100 mainly includes an outer case 5-10, a base 5-20, a holder5-30, a first driving coil 5-40, a frame 5-50, a plurality of magneticelements 5-60 (including first magnetic elements 5-62 and secondmagnetic elements 5-64), a first resilient element 5-70, a secondresilient element 5-72, a group of third resilient elements 5-74, and acircuit board 5-80 (a plurality of second driving coils 5-82 areembedded in the circuit board 5-80) in this embodiment. The opticalmodule 5-100 may drive an optical element (not shown) to move to achieveauto focus (AF) or optical image stabilization (OIS). The outer case5-10, the base 5-20 and the circuit board 5-80 may be referred to as afixed portion, the holder 5-30 and the frame 5-50 may be referred to asa movable portion 5-M, wherein the movable portion 5-M is movablyconnected to the fixed portion 5-F and can move relative to the fixedportion 5-F. Moreover, the first driving coils 5-40, the magneticelements 5-60 and the second driving coils 5-82 may be referred to as adriving assembly 5-D to drive the movable portion 5-M to move relativeto the fixed portion 5-F.

The outer case 5-10 can be combined with the base 5-20 to form housingfor the optical module 5-100. It should be noted that an outer caseopening 5-12 and a base opening 5-22 are respectively provided on theouter case 5-10 and the base 5-20. The center of the outer case opening5-12 is located at an optical axis 5-O of the optical element (notshown). The base opening 5-22 corresponds to an image sensor (not shown)placed outside the optical module 5-100. Accordingly, the lens in theoptical module 5-100 can perform image focusing in the direction of theoptical axis 5-O with the image sensor.

The holder 5-30 has a through hole, wherein the optical element can befixed in the through hole. The magnetic elements 5-60 are affixed to theframe 5-50 or may move relative to the frame 5-50. It should be notedthat a magnetic force may be generated by the interaction between themagnetic elements 5-60 and the first driving coils 5-40 to move theholder 5-30 relative to the frame 5-50 along the optical axis 5-O,thereby achieving fast focusing.

In this embodiment, the holder 5-30 and the optical element therein aremovably disposed in the frame 5-50. More specifically, the holder 5-30is suspended in the frame 5-50 by the first resilient element 5-70 andthe second resilient element 5-72 made of a metal material (FIG. 51).When a current is supplied to the first driving coils 5-40, the firstdriving coils 5-40 can act with the magnetic field of the magneticelements 5-60 to generate an electromagnetic force to move the holder5-30 and the lens therein along the optical axis 5-O direction withrespect to the frame 5-50 to achieve auto focusing.

The circuit board 5-80, such as a flexible printed circuit board (FPC),is fixed to the base 5-20 by adhesion, for example. In this embodiment,the circuit board 5-80 is electrically connected to electronic elementsinside or outside the optical module 5-100 to perform auto focus,optical image stabilization, etc. The circuit board 5-80 may alsotransmit electrical signal to the first driving coils 5-40 through thethird resilient elements 5-74 and the first resilient element 5-70 tocontrol the movement of the holder 5-30 on X-axis, Y-axis or Z-axis.Moreover, as shown in FIG. 50, a plurality of second driving coils 5-82may be embedded in the circuit board 5-80 to interact with the firstmagnetic element 5-60 or the second magnetic element 5-62 for drivingthe holder 5-30 to move. When the first driving coils 5-40 and thesecond driving coils 5-82 interact with the magnetic elements 5-60,driving forces having different directions may be generated to performfunctions such as auto focusing and optical image stabilization.

One end of each of the four third resilient elements 5-74 is affixed tothe circuit board 5-80 and the other end is connected to the firstresilient element 5-70, so that the frame 5-50 and the lens holder 5-30can be suspended in the top case 5-10 by third resilient elements 5-74.The third resilient elements 5-74 may be a suspension wire and mayinclude a metal material.

FIG. 52 is a schematic view of some elements of the optical module5-100. A frame 5-50 is required in the optical module 5-100 to fix themagnetic elements 5-60, so a certain space may be occupied, and theframe 5-50 may cause the movable portion 5-M cannot be positionedcorresponding to the magnetic elements 5-60 in a correct position whenthe movable portion 5-M moved a certain distance. Furthermore, magneticpole reversal may happen at the lower portion of the optical module5-100 (the portion adjacent to a light exit side 5-P2, −Z direction),which causes the movable portion 5-M cannot be driven, and the movabledistance of the movable portion is limited. As a result, in someembodiments, as shown in FIG. 51, a center 5-C1 of the holder 5-30 maybe closer to a light incident side 5-P1 (away from the light exit side5-P2) than a center 5-C2 of the first driving coils 5-40 in Z directionto ensure the holder 5-30 has enough space to be combined with theoptical element (not shown), and the mechanical strength of the opticalmodule 5-100 may also be enhanced.

It should be noted that in FIG. 52, the axis 5-W of the first drivingcoils 5-40 have a different extending direction to the optical axis 5-Oin this embodiment, and the first driving coils 5-40 may becapsule-shaped coils to allow the center 5-C1 of the holder 5-30 beingcloser to the light incident side 5-P1 (away from the light exit side5-P2) than the center 5-C2 of the first driving coils 5-40. As a result,the movable portion 5-M may be moved closer to the light incident side5-P1. Moreover, the size of the first magnetic elements 5-62 or thesecond magnetic elements 5-64 may be increased to increase the drivingforce of the driving assembly 5-D.

In some embodiments, the magnetic pole directions of the first magneticelements 5-62 and the second magnetic elements 5-64 may be designed tobe perpendicular to the optical axis 5-O. For example, as shown in FIG.51, the magnetic pole direction 5-D1 of the first magnetic element 5-62is oriented in the −X direction, the magnetic pole direction 5-D2 of thesecond magnetic element 5-64 is oriented in the X direction, and both ofthe magnetic pole directions 5-D1 and 5-D2 are perpendicular to theoptical axis 5-O (Z direction). Furthermore, in some embodiments, theposition of the first magnetic element 5-62 may be designed to be closerto the optical incident side 5-P1 than the second magnetic element 5-64to achieve miniaturization, as shown in FIG. 51.

Furthermore, the magnetic elements 5-60 may be designed to be asymmetricto allow the design of the optical module 5-100 becoming more flexiblein some embodiments. For example, as shown in FIG. 51, the magneticelements 5-60 include first magnetic elements 5-62 and second magneticelements 5-64, wherein the second magnetic elements 5-64 may correspondto the second driving coils 5-82. The height 5-L1 of the first magneticelement 5-62 may be different than the height 5-L2 of the secondmagnetic elements 5-64 along the optical axis 5-O (Z direction). In someembodiments, the height 5-L1 may be designed to be smaller than theheight 5-L2 to further increase the performance of the optical module5-100. Furthermore, in some embodiments, as shown in FIG. 52, the firstmagnetic elements 5-62 and the second magnetic elements 5-64 may bealigned in a direction identical to the optical axis 5-O, or the firstmagnetic elements 5-62 and the second magnetic elements 5-64 may bealigned in a different direction than the optical axis 5-O to meet thedriving force requirement in different directions.

FIG. 53 is a top view of some elements of the optical module 5-100, andFIGS. 54 and 55 are enlarged views of the region 5-R1 in FIG. 53 viewedin different directions. As shown in FIGS. 53 to 55, electricalconnecting protrusions 5-31 may be provided on the holder 5-30, and astereo circuit 5-32 may be disposed on the holder 5-30 in someembodiments to facilitate the electrical connection of the drivingassembly 5-D (such as including the first driving coils 5-40, themagnetic elements 5-60 and the second driving coils 5-82, etc.). Forexample, a portion of the first driving coil 5-40 is wound on theelectrical connecting protrusion 5-31 to be electrically connected toother element of the optical module 5-100 through the stereo circuit5-32. The electrical connecting protrusions 5-31 may position at thecorners of the optical module 5-100 and extend in different directions(such as extended to the corners of the optical module 5-100) to utilizethe space at the corners of the optical module 5-100, therefore theoptical module 5-100 may be further miniaturized. Furthermore, astopping portion 5-54 may be provided on the frame 5-50 corresponding tothe surrounding of the electrical connecting protrusions 5-31, and thestopping portion 5-54 has a surface 5-54A facing the holder 5-30 torestrict the movable range of the holder 5-30, so the electricalconnection protrusions 5-31 may be prevented from contacting otherportions of the frame 5-50 to avoid damage.

In general, if more than one driving assemblies (such as the combinationof a magnetic element and a driving coil) is desired to be disposed inthe optical module, a connecting wire is required to connect differentdriving assemblies. However, the connecting wire is weak and need alarge space. In this embodiment, if more than one driving assemblies 5-Dis required in the optical module, the driving assemblies 5-D may beconnected by the electrical connecting protrusions 5-31 and the stereocircuit 5-32 on the holder 5-30 to avoid the problems caused by theadditional connecting wire. In some embodiments, there are at least twoelectrical connection portions 5-31 and at least two driving coils 5-40in the optical module 5-100. A portion of each of the driving coils 5-40is wound on one of the electrical connecting protrusions 5-31, and thedriving coil 5-40 is electrically connected to the fixed portion 5-F(such as the base 5-20 or the circuit board 5-80) to further increasethe driving force. In this condition, an additional circuit element 5-24may be disposed in the base 5-20 (such as embedded in the base 5-20) toallow the driving coil 5-40 electrically connected to other externalelements through the circuit element 5-24. Furthermore, heat dissipatingholes 5-26 may be provided on the base 5-20 to dissipate the heatgenerated from the circuit element 5-24 during operation.

Moreover, a damping element 5-90 may be disposed on a position 5-53 forthe damping element between the frame 5-30 and the frame 5-50 tostabilize the holder 5-30, preventing any unnecessary vibration fromoccurring during operation of the holder 5-30. Furthermore, the dampingelement 5-90 is also disposed on the electrical connecting protrusion5-31 to achieve miniaturization. The damping element 5-90 may be anelement such as gel which can absorb vibration.

In some embodiments, as shown in FIG. 53, a positioning portion 5-51 anda positioning portion 5-52 may be provided on the frame 5-50 to positionthe frame 5-50 when assembling the frame with other elements. Forexample, the shapes of the positioning portion 5-51 and the positioningportion 5-52 may be different for error proof during assembly. In someembodiments, as shown in FIG. 53, the positioning portion 5-51 may becircular and the positioning portion 5-52 may be strip-shaped whenviewed along the optical axis 5-O to prevent the problem caused by themanufacture tolerance of the elements.

FIG. 56 is a schematic view of some elements of the optical module, FIG.57 is a cross-sectional view illustrated along line 5-B-5-B′ in FIG. 56,and FIG. 58 is an enlarged view of the region 5-R2 in FIG. 57. In someembodiments, as shown in FIGS. 56 to 58, openings 5-55 may be providedon the frame 5-50, and an adhesive element 5-92 may be provided in theopening 5-55 (FIG. 58) to fix the relative position of the frame 5-50and a portion of the driving assembly 5-D (such as the first magneticelement 5-62 and/or the second magnetic element 5-62). The optical axis5-O does not pass through the openings 5-55, and the openings 5-55 mayincrease the contact area between the adhesive element 5-92 and theframe 5-50, and the adhesive element 5-92 may be provided on the frame5-50 from the outer side of the frame 5-50 (the side away from theoptical axis 5-O) to simplify the assembly steps of the optical module5-100. The driving assembly 5-D is disposed on the side of the frame5-50 facing the optical axis 5-O (inner side), so the opening 5-55 maybe farther from the optical axis 5-O than the driving assembly 5-D (suchas the first magnetic element 5-62 and the second magnetic element5-64). In other words, the distance between the opening 5-55 and theoptical axis 5-O may be greater than the distance between the drivingassembly 5-D and the optical axis 5-O.

Furthermore, a plurality of protrusions 5-56 may be provided on thesidewall of the frame 5-50, and the protrusions 5-56 extend toward theouter case 5-10 (a portion of the fixed portion 5-F) to be the portionof the frame 5-50 that contacts the outer case 5-10, so the moving rangeof the frame 5-50 may be limited to prevent the frame 5-50 from movingtoo much and damaging the optical module 5-100. As a result, theshortest distance between the protrusion 5-56 and the outer case 5-10may be less than the shortest distance between the opening 5-55 and theouter case 5-10. As a result, if the outer case 5-10 collides with theframe 5-50, it can be ensured that it is the protrusions 5-56 collidingwith the outer case 5-10 rather than other portions of the frame 5-50.Furthermore, the protrusions 5-56 may prevent the adhesive element 5-92in the openings 5-55 from coming into direct contact with the outer case5-10. In some embodiments, there are at least two protrusions 5-56, andthe opening 5-55 may be disposed between the protrusions 5-56 to furtherutilize the space of the frame 5-50.

As shown in FIG. 58, the opening 5-55 may be wider at the outer side andbe narrower at the inner side (such as have a stepped shape) in across-sectional view, wherein the width (such as the size in the Zdirection) at the side away from the optical axis 5-O is greater. Theadhesive element 5-92 may be disposed on the portion 5-55B of theopening 5-55 with a smaller width, and the portion 5-55A of the opening5-55 with a greater width may be utilized to prevent the adhesiveelement 5-92 from overflowing to the outside of the opening 5-55, so theposition of the adhesive element 5-92 may be controlled. Furthermore,the fixing strength between the frame 5-50 and the magnetic element 5-60may be further increased by the design of the opening 5-55 (having awider shape at the outer side and a narrower shape at the inner side),such as using a hook configuration to fix the frame 5-50 and themagnetic element 5-60. Moreover, in a direction that is perpendicular tothe optical axis 5-O (X direction), the opening 5-55 partially overlapsthe first magnetic element 5-62 and the second magnetic element 5-64 toallow the adhesive element 5-92 disposed in the opening 5-55 to comeinto contact with the first magnetic element 5-62 and the secondmagnetic element 5-64 at the same time.

FIG. 59 is a bottom view of some elements of the optical module 5-100 insome embodiments of the present disclosure, and FIGS. 60 and 61 areenlarged views of the region 5-R3 in FIG. 59. Additional adhesivematerial 5-94 is shown in FIG. 61 but not shown in FIG. 60. A recess5-33 that is concave in the optical axis 5-O direction may be providedon the holder 5-30 for corresponding to the driving assembly 5-D and theplate-shaped second resilient element 5-72 (or the first resilientelement 5-70) at the same time. As a result, as shown in FIG. 61, theadhesive material 5-94 contacts three elements (the holder 5-30, thefirst driving coil 5-40 and the second resilient element 5-72) at thesame time to fix their relative position. It should be noted that thedirection of the axis 5-W (X direction) of the first driving coil 5-40(FIG. 52) is different than the thickness direction of the secondresilient element 5-72 (Z direction). As a result, miniaturization maybe achieved and the assembly steps may be simplified.

FIG. 62 is an enlarged view of the region 5-R4 in FIG. 59. As shown inFIG. 62, the string portion 5-72A of the second resilient element 5-72may partially overlap the electrical connecting protrusion 5-31 in theoptical axis direction to reduce the distance required for electricalconnection, so miniaturization may be achieved.

In some embodiments, positioning columns 5-57 may be provided on theframe 5-50, and the first resilient element 5-70 or the second resilientelement 5-72 may have holes corresponding to the positioning columns5-57 to fix the relative position of the frame 5-50 to the firstresilient element 5-70 or the second resilient element 5-72 during theassembly steps of the optical module 5-100, as shown in FIG. 59.Furthermore, a stopping portion 5-58 may be provided on the corner ofthe frame 5-50 and extending in the Z direction from the frame 5-50. Byproviding the stopping portion 5-58 at the corner of the frame 5-50, themovable range of the holder 5-30 and the frame 5-50 may be limited toprevent other portions of the holder 5-30 and the frame 5-50 fromcolliding with other elements.

Refer to FIGS. 63 to 68, wherein FIGS. 63, 65 and 67 are side views ofsome elements of the optical modules 5-100, 5-200 and 5-300 in someembodiments of the present disclosure, and FIGS. 64, 66 and 68 areenlarged views of FIGS. 63, 65 and 67, respectively. In FIGS. 63 and 64,the third resilient element 5-74 of the optical module 5-100 extends ina direction that is substantially parallel to the optical axis 5-O andconnects to the first resilient element 5-70 and the second resilientelement 5-72. However, the present disclosure is not limited thereto. InFIGS. 65 to 68, the distance between the two connecting points of thethird resilient elements 5-74 and the first resilient element 5-70 isdifferent than the distance between the two connecting points of thethird resilient elements 5-74 and the second resilient element 5-72. Forexample, in FIG. 65, the distance between the two connecting points ofthe third resilient elements 5-74 and the first resilient element 5-70of the optical module 5-200 is less than the distance between the twoconnecting points of the third resilient elements 5-74 and the secondresilient element 5-72 of the optical module 5-200 and FIG. 67, and thedistance between the two connecting points of the third resilientelements 5-74 and the first resilient element 5-70 of the optical module5-300 is greater than the distance between the two connecting points ofthe third resilient elements 5-74 and the second resilient element 5-72of the optical module 5-300. In other words, the third resilient element5-74 may tilt toward or away from the optical axis 5-O. In someembodiments, the angle that the third resilient element 5-74 can tilt(such the angle 5-01 in FIG. 66 or the angle 5-02 in FIG. 68) may bebetween +10 degrees to −10 degrees to enhance the design flexibility.

FIG. 69 is a top view of an optical module (such as the optical modules5-100, 5-200 or 5-300) in some embodiments of the present disclosure. Inorder to allow the third resilient element 5-74 tilting, a recessedportion facing to outer side (away from the optical axis 5-O) may beprovided on the string portion 5-70A at the corner of the firstresilient element 5-70 to allow the third resilient element 5-74 movesat the recessed portion of the string portion 5-70A. Furthermore, asshown in FIG. 69, the recessed portions of the string portions 5-70A atfour corners may be oriented in different directions to balance thestress that the first resilient element 5-70 withstands.

In summary, an optical module is provided in the present disclosure,which has a first magnetic element and a second magnetic element withdifferent sizes along the optical axis. As a result, the designflexibility of the optical module may be enhanced, miniaturization maybe achieved, and the driving force of the optical module may beincreased.

FIG. 70 is a perspective view of a driving mechanism 6-100 according toan embodiment of the present disclosure, FIG. 71 is an exploded view ofthe driving mechanism 6-100 in FIG. 70, and FIG. 72 is a cross-sectionalview illustrated along line 6-A-6-A′ in FIG. 70. As shown in FIGS. 70 to72, the driving mechanism 6-100 mainly includes an outer case 6-10, abase 6-20, a holder 6-30, a first driving assembly 6-D1 (includes afirst driving coil 6-40, a plurality of first magnetic elements 6-60 anda plurality of second magnetic elements 6-62), a frame 6-50, a firstresilient element 6-70, a second resilient element 6-72, a group ofsuspension wires 6-74, and a circuit board 6-80 in this embodiment. Thedriving mechanism 6-100 may drive an optical element (not shown) to moveto achieve auto focus (AF) or optical image stabilization (OIS).

The outer case 6-10 can be combined with the base 6-20 to form housingfor the driving mechanism 6-100. It should be noted that an outer caseopening 6-12 and a base opening 6-22 are respectively formed on theouter case 6-10 and the base 6-20. The center of the outer case opening6-12 is located at an optical axis of the optical element (not shown).The base opening 6-22 corresponds to an image sensor (not shown) placedoutside the driving mechanism 6-100. Accordingly, the lens in thedriving mechanism 6-100 can perform image focusing in the direction ofthe optical axis 6-O with the image sensor.

The holder 6-30 has a through hole, wherein the optical element can befixed in the through hole. The first driving coil 6-40 is wound aroundthe outer surface of the holder 6-30. The frame 6-50 has an opening6-52, wherein the first magnetic elements 6-60 are affixed to the frame6-50 or may move relative to the frame 6-50. It should be noted that amagnetic force may be generated by the interaction between the firstmagnetic elements 6-60 and the first driving coil 6-40 to move theholder 6-30 relative to the frame 6-50 along the optical axis O, therebyachieving fast focusing.

In this embodiment, the holder 6-30 and the optical element therein aremovably disposed in the frame 6-50. More specifically, the holder 6-30is suspended in the frame 6-50 by the first resilient element 6-70 andthe second resilient element 6-72 made of a metal material (FIG. 72).When a current is supplied to the first driving coil 6-40, the firstdriving coil 6-40 can act with the magnetic field of the first magneticelements 6-60 to generate an electromagnetic force to move the holder6-30 and the lens therein along the optical axis direction with respectto the frame 6-50 to achieve auto focusing.

The circuit board 6-80, such as a flexible printed circuit board (FPC),is fixed to the base 6-20 by adhesion, for example. In this embodiment,the circuit board 6-80 is electrically connected to electronic elementsinside or outside the driving mechanism 6-100 to perform auto focus,optical image stabilization, etc. The circuit board 6-80 may alsotransmit electrical signal to the first driving coil 6-40 through thesuspension wires 6-74 and the first resilient element 6-70 to controlthe movement of the holder 6-30 on X-axis, Y-axis or Z-axis. Moreover,as shown in FIG. 71, a plurality of second driving coils 6-82 may beembedded in the circuit board 6-80 to interact with the first magneticelement 6-60 or the second magnetic element 6-62 for driving the holder6-30 to move.

One end of the four suspension wires 6-74 is fixed to the circuit board6-80 and the other end is connected to the first resilient element 6-70,so that the frame 6-50 and the lens holder 6-30 can be suspended in thetop case 6-10 by suspension wires 6-74. The suspension wires 6-74 mayinclude a metal material.

FIG. 73 is a top view of some elements of the driving mechanism 6-100 insome embodiments of the present disclosure, and FIG. 74 is across-sectional view illustrated along a line 6-B-6-B′ in FIG. 73. Theholder 6-30 includes a first holder surface 6-31 facing the Z direction,and the frame 6-50 includes a first frame surface 6-51 facing the Zdirection. In FIG. 74, the shortest distance 6-S1 between the firstholder surface 6-31 and the first resilient element 6-70 is differentfrom the shortest distance 6-S2 between the first frame surface 6-51 andthe first resilient element 6-70. In some embodiments, the shortestdistance 6-S1 is greater than the shortest distance 6-S2. As shown inFIG. 73, the first resilient element 6-70 partially overlaps the firstholder surface 6-31 and the first frame surface 6-51 when viewed alongthe optical axis 6-O. In other words, both the first holder surface 6-31and the first frame surface 6-51 face the first resilient element 6-70but not contact the first resilient element 6-70.

Because the holder 6-30 belongs to the movable portion of the drivingmechanism 6-100 (the portion which can move relative of the outer case6-10 and the bottom 6-20), so there will be a great distance variationbetween the first holder surface 6-31 and the first resilient element6-70. As a result, a gap is formed between the first holder surface 6-31and the first resilient element 6-70, and formed between the first framesurface 6-51 and the first resilient element 6-70 to prevent collisionbetween the holder 6-30 or the frame 6-50 to the first resilient element6-70 from occurring at the first holder surface 6-31 and at the firstframe surface 6-51, and the driving mechanism 6-100 may be miniaturizedas well. The distance variation between the first holder surface 6-31and the first resilient element 6-70 is different than the distancevariation between the first frame surface 6-51 and the first resilientelement 6-70 when the holder 6-30 is moving. As a result, depending ondesign requirements, the distance between the first holder surface 6-31and the first resilient element 6-70 and the distance between the firstframe surface 6-51 and the first resilient element 6-70 may be adjustedindividually to prevent damage from occurring due to collision betweenthe elements.

In some embodiments, when the holder 6-30 moves relative to the frame6-50 along the optical axis 6-O, the movable distance of the holder 6-30toward the first resilient element 6-70 (i.e. +Z direction) is differentthan the movable distance of the holder 6-30 away from the firstresilient element 6-70 (i.e. −Z direction). For example, in someembodiments, the movable distance of the holder 6-30 in +Z direction isgreater than the movable distance of the holder 6-30 in −Z direction. Asa result, the performance of the driving mechanism 6-100 may be furtherenhanced.

Referring to FIGS. 73, 75 and 76, wherein FIGS. 75 and 76 arecross-sectional views of the driving mechanism 6-100 illustrated alonglines 6-C-6-C′ and 6-D-6-D′ in FIG. 73, respectively, frame 6-50 furtherincludes a second frame surface 6-52 and a protruding portion 6-53, andthe second frame surface 6-52 and the first frame surface 6-51 face thesame direction. The protruding portion 6-53 extends along the opticalaxis 6-O (Z direction), and the protruding portion 6-53 is disposed onthe first frame surface 6-51 and the second frame surface 6-52 and isacross the first frame surface 6-51 and the second frame surface 6-52.

Furthermore, in FIG. 76, the first frame surface 6-51 is closer to aconnection 6-54 of the frame 6-50 and the first resilient element 6-70than the second frame surface 6-52. In other words, the distance betweenthe first frame surface 6-51 and the connection 6-54 is less than thedistance between the second frame surface 6-52 and the connection 6-54.

In FIG. 75, the shortest distance 6-S1 between the first holder surface6-31 and the first resilient element 6-70 is greater than the shortestdistance 6-S3 between the second frame surface 6-52 and the firstresilient element 6-70 (i.e. 6-S1>6-S3). Furthermore, the shortestdistance 6-S3 between the second frame surface 6-52 and the firstresilient element 6-70 is greater than the shortest distance 6-S2between the first frame surface 6-51 and the first resilient element6-70 (i.e. 6-S3>6-S2) in FIG. 76. In other words, 6-S1>6-S3>6-S2. Thefirst resilient element 6-70 has different deformation amounts at aposition corresponding to the first frame surface 6-51 and at a positioncorresponding to the second frame surface 6-52 when the holder 6-30 ismoving. For example, the deformation amount of the first resilientelement 6-70 at the position corresponding to the first frame surface6-51 may be less than the deformation amount of the first resilientelement 6-70 at the position corresponding to the second frame surface6-52. Therefore, making the shortest distance 6-S3 greater than theshortest distance 6-S2 allows the distance between the second framesurface 6-52 and the first resilient element 6-70 being furtherincreased. As a result, the first resilient element 6-70 may be furtherprevented from colliding to the frame 6-50 at a position having agreater deformation amount (i.e. the position corresponding to thesecond frame surface 6-52) when the driving mechanism 6-100 isoperating, and the driving mechanism 6-100 may be miniaturized as well.Moreover, providing the protruding portion 6-53 on the frame 6-50 canincrease the mechanical strength of the frame 6-50 to enhance thedurability of the frame 6-50.

FIG. 77 is a schematic view of some elements of the driving mechanism6-100 (the case 6-10 is omitted), FIG. 78 is an enlarged view of someelements of the driving mechanism 6-100 (indicated by the region 6-R1),and FIG. 79 is a side view of the driving mechanism 6-100 in FIG. 74. InFIG. 8, the frame 6-50 further includes a damping material placingportion 6-55 extending toward the base 6-20, and a damping materialpositioning structure 6-56 is formed on one side of the damping materialplacing portion 6-55, and the side is adjacent to the base 6-20.Furthermore, an opening 6-57 is formed on the damping materialpositioning structure 6-56 and is concave to a direction away from theoptical axis 6-O.

In FIGS. 8 and 10, a damping material 6-90 may be provided between theframe 6-50 and the base 6-20 (the suspension wires 6-74 and the dampingmaterial 6-90 are omitted in FIG. 78), and a portion of the dampingmaterial 6-90 may be disposed on the damping material positioningstructure 6-56 and fixed in the opening 6-57. The damping material 6-90may be a damping material such as gel. The damping material positioningstructure 6-56 has a concave structure to provide the damping material6-90 by, for example, dispensing.

In FIG. 79, a portion of the damping material 6-90 overlaps to thesecond driving coil 6-82 embedded in the circuit board 6-80 (pleaserefer to FIG. 71 as well) when viewed in a direction that isperpendicular to the optical axis 6-O. The vibration or the oscillation(such as resonance) of the driving mechanism 6-100 may be prevented fromoccurring by providing the damping material 6-90 on the drivingmechanism 6-100. Furthermore, forming the opening 6-57 on the dampingmaterial positioning structure 6-56 further increases the contact areabetween the damping material 6-90 and the frame 6-50 to allow thedamping material 6-90 being disposed between the base 6-20 and the frame6-50 in a more stable way, and the driving mechanism 6-100 may beminiaturized.

As shown in FIG. 77, stopping portions 6-S are formed at the corners ofthe frame 6-50 and positioned between the first resilient element 6-70and the holder 6-30 and extends from the frame 6-50 to the Z direction.By providing the stopping portions 6-S on the corners of the frame 6-50,the movement of the holder 6-30 may be limited to prevent the holder6-30 from colliding with other elements. Furthermore, providing thestopping portions 6-S between the first resilient element 6-70 and theholder 6-30 may prevent the first resilient element 6-70 from directlycontacting the holder 6-30 at the corners, so the durability of thefirst resilient element 6-70 may be increased. In particular, the firstresilient element 6-70 is exposed from one side of the stopping portion6-S rather than winding around the stopping portion 6-S when viewedalong the optical axis 6-O.

Referring to FIGS. 77 and 80, wherein FIG. 80 is a top view of thedriving mechanism 6-100, the holder 6-30 further includes a plurality ofelectrical connecting portions 6-32 extending to the Z direction. Eachof the electrical connecting portions 6-32 has an electrical connectingsurface 6-33, and the first driving coil 6-40 is electrically connectedto the first resilient element 6-70 at the electrical connecting surface6-33 by soldering, welding or by using conductive paste, etc. It shouldbe noted that all electrical connecting surfaces 6-33 of the electricalconnecting portions 6-32 face the same direction, such as the direction6-G in FIGS. 77 and 80. Moreover, the electrical connecting portions6-32 are exposed from the outer case 6-10 when viewed along the opticalaxis 6-O. As a result, miniaturization may be achieved by allowing theelectrical connecting portions 6-32 being parallel to the optical axis6-O. Making the electrical connecting portions 6-32 being exposed fromthe outer case 6-10 and letting the electrical connecting surfaces 6-33that are facing in the same direction aid in the assembly of the drivingmechanism 6-100.

FIG. 81 is a top view of the frame 6-50 in some embodiments of thepresent disclosure. The frame 6-50 includes a first side 6-58 and asecond side 6-59 extending in a direction that is perpendicular to theoptical axis 6-O, and the first side 6-58 and the second side 6-59extend toward different directions. For example, the first side 6-58 mayextend in the Y direction and the second side 6-59 may extend in the Xdirection. Furthermore, in some embodiments, the length 6-L1 of thefirst side 6-58 on a first extending direction of the first side 6-58(i.e. Y direction) is greater than the length 6-L2 of the second side6-58 on a second extending direction of the second side 6-58 (i.e. Xdirection), and a width 6-W1 of the first side 6-58 is less than a width6-W2 of the second side 6-59. As a result, the size of the frame 6-50 ona specific direction may be reduced (e.g. X direction in thisembodiment) to utilize the space of the driving mechanism 6-100 in amore effective way, and the performance of the driving mechanism 6-100may be increased.

FIG. 82 is a schematic view of some elements of the driving mechanism6-100 in some embodiments of the present disclosure, and FIGS. 83 and 84are top views of some embodiments of the driving mechanism 6-100. Asecond driving assembly 6-D2 includes the first magnetic elements 6-60,the second magnetic elements 6-62 and the second driving coils 6-82(including first coils 6-82A and second coils 6-82B) embedded in thecircuit board 6-80. In FIG. 82, the first magnetic element 6-60 isdisposed at the first side 6-58 of the frame 6-50 and is correspondingto the first coil 6-82A embedded in the circuit board 6-80 (e.g.partially overlap with each other when viewed in the Z direction), andthe second magnetic element 6-62 is disposed at the second side 6-59 ofthe frame 6-50 and is corresponding to the second coil 6-82B embedded inthe circuit board 6-80 (e.g. partially overlap with each other whenviewed in the Z direction). Furthermore, the thickness 6-T1 of the firstmagnetic element 6-60 in the X direction is less than the thickness 6-T2of the second magnetic element 6-62 in the Y direction in FIG. 83.

Providing the second driving assembly 6-D2 in the driving mechanism6-100 can increase the amount of the moving dimensions of the holder6-30, such as allowing the holder being moved or rotated. Furthermore,the greatest range for the first coil 6-82A being disposed is shown asthe region 6-R2 in FIG. 84, and the greatest range for the second coil6-82B being disposed in shown as the region 6-R3 in FIG. 84, wherein thewidth of the region 6-R2 in the X direction may be less than the widthof the region 6-R3 in the Y direction, and the length of the region 6-R2in the Y direction may be greater than the length of the region 6-R3 inthe X direction.

In some embodiments, the number of turns of the first coil 6-82A may bedesigned to be less than the number of turns of the second coil 6-82B toreduce the width of the first coil 6-82A in the X direction.Furthermore, the first magnetic element 6-60 corresponding to the firstcoil 6-82A may have a greater size than the second magnetic element 6-62corresponding to the second coil 6-82B to adjust the driving force ofthe driving mechanism 6-100. Moreover, a portion of the first coil 6-82Amay overlap the second coil 6-82B in a direction that is perpendicularto the optical axis 6-O. In this embodiment, the magnetic elements 6-60and 6-62 and the first coil 6-82A and the second coil 6-82B may bedesigned to have different sizes to allow the driving mechanism 6-100having a rectangular shape, so the space of the driving mechanism 6-100on a specific direction may be further utilized.

FIG. 85 is a schematic view of the holder 6-30 and the first drivingcoil 6-40 of some embodiments of the present disclosure, FIG. 86 is anenlarged view of the region 6-R4 in FIG. 85 viewing from a differentdirection, FIG. 87 is a cross-sectional view illustrated along a line6-E-6-E′ in FIG. 73, and FIG. 88 is a cross-sectional view illustratedalong a line 6-F-6-F′ in FIG. 73. In FIGS. 85-88, the holder 6-30includes a second holder surface 6-34 and a recess 6-35, wherein thesecond holder surface 6-34 faces a first segment 6-42 of the firstdriving coil 6-40, and the recess 6-35 is corresponding to the firstsegment 6-42. In some embodiments, adhesive (not shown) may be providedin the recess 6-35 to bond the holder 6-30 and the first segment 6-42.The adhesive may be stored in the recess 6-35 to prevent adhesive fromoverflowing to other elements.

As shown in FIG. 87, the second resilient element 6-72 directly facesthe first segment 6-42 of the driving coil 6-40 in the Z direction. Inother words, no other element is positioned between the second resilientelement 6-72 and the driving coil 6-40 in the Z direction. As a result,the risk of the second resilient element 6-72 from colliding to otherelements may be reduced. Furthermore, providing the recess 6-35 on theholder 6-30 also increases the structural strength of the holder 6-30and reduces the weight of the holder 6-30.

Referring back to FIGS. 74 and 82, the frame 6-50 includes a frame topwall 6-50A substantially perpendicular to the optical axis 6-O and frameside walls 6-50B and 6-50C substantially parallel to the optical axis6-O. As shown in FIG. 74, the frame top wall 6-50A includes a thirdframe surface 6-50D, and each of the frame side walls 6-50B and 6-50Cincludes a fourth frame surface 6-50E, wherein both the third framesurface 6-50D and the fourth surface 6-50E face the magnetic element6-60, and the third frame surface 6-50D and the fourth surface 6-50E arefacing in different directions. For example, in some embodiments, thefirst frame surface 6-50D may be perpendicular to the optical axis 6-O,and the fourth frame surface 6-50E may be parallel to the optical axis6-O. Furthermore, the outer case 6-10 further includes a top case 6-14and sidewalls 6-16 extending from the sides of the top case 6-14 alongthe optical axis 6-O, and the fourth frame surface 6-50E is parallel tothe surface 6-18 of the sidewall 6-16.

Moreover, the frame side walls 6-50B and 6-50C are two differentportions extending in different directions, and the sizes of the firstside wall 6-50B and the second side wall 6-50C along the optical axis6-O (Z direction) are different. For example, FIGS. 89 and 90 are sideviews of the frame 6-50 viewed in the X direction and the Y direction,respectively, wherein the height 6-H1 of the first side wall 6-50B inthe Z direction is greater than the height 6-H2 of the second side wall6-50C in the Z direction. As a result, the contact area between theframe 6-50 to the first magnetic element 6-60 and the second magneticelement 6-62 may be increased to enhance the bonding between the frame6-50 to the first magnetic element 6-60 and the second magnetic element6-62 and the mechanical strength of the bonding. Moreover, the drivingmechanism 6-100 may have an asymmetry structure in the X direction andthe Y direction to miniaturize the driving mechanism 6-100 in a specificdirection. Moreover, as shown in FIG. 74, because a portion of the firstframe surface 6-51 does not overlap the frame side walls 6-50B and 6-50Cin the Z direction, the space for the first resilient element 6-70 maybe increased to decrease the design difficulty of the driving mechanism6-100.

FIG. 91 is a top view of some elements of the driving mechanism 6-100,and FIG. 92 is an enlarged view of the region 6-R5 in FIG. 91. The frame6-50 further includes a positioning portion 6-50F having a positioningsurface 6-50G facing the first magnetic element 6-60 or the secondmagnetic element 6-62 and does not perpendicular to the correspondingfourth frame surface 6-50E, and the positioning surface 6-50G isparallel to the optical axis 6-O. As a result, the positioning portion6-50F contacts the first magnetic element 6-60 or the second magneticelement 6-62 to locate the position of the first magnetic element 6-60or the second magnetic element 6-62 when the driving mechanism 6-100 isbeing assembled. In some embodiments, the distance between thepositioning surface 6-50G and the optical axis 6-O is less than thedistance between the fourth frame surface 6-50E and the optical axis6-O. As a result, the contact area between the frame 6-50 and themagnetic elements may be further increased to strengthen the bondingbetween the frame 6-50 to the magnetic elements 6-60 and 6-62.

Moreover, in some embodiments, adhesive material (not shown) may beprovided between the third frame surface 6-50D (or the fourth framesurface 6-50E) to the magnetic elements 6-60 and 6-62. Because theadhesive material is provided on surfaces facing different directions,the bonding and fixing ability between the magnetic elements 6-60 and6-62 and the frame 6-50 along different directions may be increased.

In summary, a driving mechanism for holding and driving an opticalelement is provided in the present disclosure. By making the distancebetween the frame of the driving mechanism to the resilient elementdifferent to the distance between the holder to the resilient element,the durability of the driving mechanism may be increased, and the sizeof the driving mechanism may be decreased to achieve miniaturization.

Referring to FIG. 93, in an embodiment of the invention, the opticalmember driving mechanism 7-10 can be disposed in an electronic device7-20 and used to hold and drive a lens 7-30, so that the lens 7-30 canmove relative to an image sensor (not shown) in the electronic device7-20, and the purpose of focus adjustment can be achieved. For example,the electronic device 7-20 can be a digital camera or a smart phonehaving the function of capturing photographs or making video recordings,and the optical member 7-30 can be a lens. The optical axis 7-O of theoptical member 7-30 is substantially parallel to the Z-axis in thedrawing, and perpendicular to the image sensor in the electronic device7-20.

FIG. 94 is a schematic diagram of the optical member driving mechanism7-10, FIG. 95 is an exploded-view diagram of the optical member drivingmechanism 7-10, and FIGS. 96, 97 and 98 are cross-sectional views alongthe line 7-A-7-A, line 7-B-7-B and line 7-C-7-C in FIG. 94. As shown inFIGS. 94-98, the optical member driving mechanism 7-10 primarilyincludes a fixed portion 7-100, a movable portion 7-200, a first elasticmember 7-300, a second elastic member 7-400, a driving assembly 7-500, acircuit board 7-600, and a sensing assembly 7-700.

The fixed portion 7-100 includes a case 7-110, a base 7-120, and a frame7-130. The case 7-110 and the base 7-120 can be assembled and form ahollow box, and the frame 7-130, the movable portion 7-200, the firstelastic member 7-300, the second elastic member 7-400, the drivingassembly 7-500, the circuit board 7-600, and the sensing assembly 7-700can be accommodated in the hollow box. The frame 7-130 can be affixed tothe base 7-120, and a gap 7-140 is formed between the frame 7-130 and alateral wall 7-111 of the case 7-110 (as shown in FIG. 96).

As shown in FIG. 97, in this embodiment, the case 7-110 further includesa bending portion 7-112 connected to the lateral wall 7-111, and thebottom surface 7-121 of the base 7-120 is disposed between the bendingportion 7-112 and the top surface 7-122 of the base 7-120 (the topsurface 7-122 faces the movable portion 7-200, and the bottom surface7-121 is opposite to the top surface 7-122). Since the case 7-110 andthe base 7-120 are respectively made of metal and non-metal material(such as plastic), the bending portion 7-112 can contact the imagesensor and support the optical member driving mechanism 7-10 when theoptical member driving mechanism 7-10 is disposed on the image sensor,so as to prevent the base 7-120 from damaging due to the pressure.

As shown in FIG. 98, in this embodiment, a depression 7-115 is formed ona case surface 7-114 of the case 7-110, and a protrusion 7-132 is formedon a frame surface 7-131 of the frame 7-131. The case surface 7-114 andthe frame surface 7-131 are substantially perpendicular to the opticalaxis 7-O of the optical member 7-30, and the case surface 7-114 facesthe frame surface 7-131. When the case 7-110 and the base 7-121 areassembled to form the hollow box, the protrusion 7-132 is accommodatedin the depression 7-115. Therefore, if the frame 7-130 moves relative tothe case 7-110 when an external force is applied on the optical memberdriving mechanism 7-10, the protrusion 7-132 and the depression 7-115can restrict the range of motion of the frame 7-130, so as to preventthe frame 7-130 from deforming due to impact.

As shown in FIGS. 94-97, the movable portion 7-200 includes an opticalmember holder 7-210. An accommodating hole 7-220 is formed on the centerof the optical member holder 7-210, and the optical member 7-30 can befixedly disposed in the accommodating hole 7-220. The case 7-110 and thebase 7-120 of the fixed portion 7-100 respectively has an optical hole7-113 and an optical hole 7-123 corresponding to the accommodating hole7-220. Thus, an external light can pass through the optical hole 7-113,the optical member 7-30, and the optical hole 7-123 in sequence andreach the image sensor in the electronic device 7-20, so as to form animage on the image sensor.

The accommodating hole 7-220 has a smooth segment 7-221, a threadedsegment 7-222, and a connecting segment 7-223, wherein the smoothsegment 7-221 and the threaded segment 7-222 are arranged along theoptical axis 7-O, and the connecting segment 7-223 connects the smoothsegment 7-221 to the threaded segment 7-222. The dimensions of thesmooth segment 7-221 are greater than that of the threaded segment7-222, so that a step is generated. The wall surface of the smoothsegment 7-221 is substantially parallel to the optical axis 7-O, and theconnecting segment 7-223 is substantially perpendicular to the opticalaxis 7-O. When the optical member 7-30 is disposed in the accommodatinghole 7-220, the user can fill a glue on the step, therefore, theadhesive area of the glue can be increased, and the optical member 7-30can be securely affixed.

The first elastic member 7-300 and the second elastic member 7-400 arerespectively disposed on the opposite sides of the optical member holder7-210. An inner section 7-310 and an outer section 7-320 of the firstelastic member 7-300 are respectively connected to the upper surface ofthe optical member holder 7-210 and the frame 7-130, and an innersection 7-410 and an outer section 7-420 of the second elastic member7-400 are respectively connected to the lower surface of the opticalmember holder 7-210 and the base 7-120. Therefore, the optical memberholder 7-210 can be hung in the hollow box by the first elastic member7-400 and the second elastic member 7-500.

The driving assembly 7-500 includes at least one first electromagneticdriving member 7-510 and at least one second electromagnetic drivingmember 7-520. The first electromagnetic driving member 7-510 is disposedon the optical member holder 7-210, and the second electromagneticdriving member 7-520 is disposed on the base 7-120 or the frame 7-130 ofthe fixed portion 7-100. The electromagnetic effect between the firstelectromagnetic driving member 7-510 and the second electromagneticdriving member 7-520 can drive the optical member holder 7-210 and theoptical member 7-30 disposed thereon to move relative to the firstmodule 7-100 along the Z-axis (the optical axis 7-O of the opticalmember 7-30).

For example, the first electromagnetic driving member 7-510 can be acoil module, and the second electromagnetic driving member 7-520 can bea magnetic member (such as a magnet). When a current flows through thecoil module (the first electromagnetic driving member 7-510), anelectromagnetic effect is generated between the coil module and themagnetic member, and provides an electromagnetic force along the Z-axison the optical member holder 7-210. Therefore, the optical member holder7-210 and the optical member 7-30 disposed thereon can move along theZ-axis relative to the fixed module 7-100 and the image sensor in theelectronic device 7-20. The purpose of focus adjustment can be achieved.

As shown in FIGS. 96 and 97, in this embodiment, the coil module (thefirst electromagnetic driving member 7-510) includes a first wire 7-511and a second wire 7-512. The first wire 7-511 and the second wire 7-512are attached on the optical member holder 7-210, and the first wire isdisposed between the optical member holder 7-210 and the second wire7-512. The first wire 7-511 and the second wire 7-512 are in parallel,therefore, when the current flows through the coil module, a largerdriving force can be generated to push the optical member holder 7-210.

Specifically, both the first wire 7-511 and the second wire 7-512 haverectangular cross-sections, and the first wire 7-511 and the second wire7-512 are disposed on the optical holder 7-210 in a mutually alignedmanner. In particular, as seen from the optical axis 7-O (the Z-axis),the stacking rectangular cross-sections of the first wire 7-511 arealigned to each other, and the stacking rectangular cross-sections ofthe second wire 7-512 are aligned to each other. As seen from adirection that is perpendicular to the optical axis 7-O (the X-axis orthe Y-axis), the stacking rectangular cross-sections of the first wire7-511 are aligned to the stacking rectangular cross-sections of thesecond wire 7-512.

Owing to the arrangement of the first wire 7-511 and the second wire7-512, the width of the coil module can be efficiently reduced, so as tofacilitate the miniaturization of the optical member driving mechanism7-10. Furthermore, since the wires use the space on the corner, which isoriginally a void, a lower impedance in the same volume can be achieved,and the energy can be further saved.

In this embodiment, the corners of each of the rectangularcross-sections of the first wire 7-511 or the second wire 7-512 isfillets 7-R, so as to prevent damaging in assembly due to collision. Atleast one of the first wire 7-511 and the second wire 7-512 can beadhesive, such that the user can easily assemble and fix.

In the aforementioned embodiment, the length of each of the rectangularcross-sections of the first wire 7-511 and the second wire 7-512 issubstantially the same as the width of each of the rectangularcross-sections of the first wire 7-511 and the second wire 7-512, but itis not limited thereto. Referring to FIG. 99, in some embodiments, thelength of each of the rectangular cross-sections of the first wire 7-511and the second wire 7-512 is different than the width of each of therectangular cross-sections of the first wire 7-511 and the second wire7-512. For example, the length in a direction that is parallel to theoptical axis 7-O is greater than the width in a direction that isperpendicular to the optical axis 7-O, so as to further reduce thedimensions of the optical member driving mechanism 7-10.

In some embodiments, the first electromagnetic driving member 7-510 canbe a magnetic member, and the second electromagnetic driving member7-520 can be a coil module.

Referring to FIGS. 95, 96, and 100, the circuit board 7-600 of theoptical member driving mechanism 7-10 is disposed in the gap 7-140,which is situated between the frame 7-130 and the case 7-110. Thecircuit board 7-600 includes a plate portion 7-610 and a protrudingportion 7-620. The plate portion 7-610 has a first surface 7-611 and asecond surface 7-612, wherein the first surface 7-611 faces the frame7-130, and the second surface 7-612 faces the case 7-110. In thisembodiment, the protruding portion 7-620 is situated between the frame7-130 and the first surface 7-611, the protruding portion 7-620 contactsthe frame 7-130, and the second surface 7-612 of the plate portion 7-610contacts the case 7-110. Since the thickness of the plate portion 7-610plus the thickness of the protruding portion 7-620 substantially equalsthe width of the gap 7-140, the circuit board 7-600 can be tightlydisposed in the gap 7-140 and substantially parallel to the optical axis7-O of the optical member 7-30.

Since the protruding portion 7-620 is situated between the frame 7-130and the first surface 7-611, and does not extend to the base 7-120, thebase 7-120 is closer to the plate portion 7-610 than the frame 7-130 asseen from the X-axis, and the protruding portion 7-620 and the base7-120 do not overlap.

Furthermore, the peripheral area of the base 7-120 includes a supportingportion 7-124 extending along the optical axis 7-O, and the firstsurface 7-611 of the plate portion 7-610 can be attached on thesupporting portion 7-124, so as to prevent the circuit board 7-600 frombending.

The sensing assembly 7-700 includes an electronic member 7-710, a sensor7-720, and a sensing object 7-730. The electronic member 7-710 and thesensor 7-720 can be disposed on the circuit board 7-600 and electricallyconnected to each other. The sensing object 7-730 can be disposed on theoptical member holder 7-210 and corresponded to the sensor 7-720.

The sensor 7-720 can detect the relative movement between the sensingobject 7-720 and the sensor 7-730 to obtain the relative positionbetween the fixed portion 7-100 and the movable portion 7-200. Forexample, the sensor 7-720 can be a Hall sensor, a magnetoresistanceeffect sensor (MR sensor), a giant magnetoresistance effect sensor (GMRsensor), a tunneling magnetoresistance effect sensor (TMR sensor), or afluxgate sensor, and the sensing object 7-730 can be a magnet.

In this embodiment, one or more recesses 7-621 are formed on theprotruding portion 7-620 of the circuit board 7-600, and the electronicmember 7-710 and the sensor 7-720 can be disposed in the recesses 7-621.Therefore, as seen from the X-axis, the protruding portion 7-620partially overlaps the electronic member 7-710 and/or the sensor 7-720.The collision to the electronic member 7-710 and/or the sensor 7-720when the movable portion 7-200 moves relative to the fixed portion 7-100can be avoided.

Referring to FIGS. 101-103, in another embodiment, an optical memberdriving mechanism 7-10′ primarily includes a fixed portion 7-100, amovable portion 7-200, a first elastic member 7-300, a second elasticmember 7-400, a driving assembly 7-500, a circuit board 7-600′, and asensing assembly 7-700. The structure and the arrangement of the fixedportion 7-100, the movable portion 7-200, the first elastic member7-300, the second elastic member 7-400, the driving assembly 7-500, andthe sensing assembly 7-700 are similar to the same component in theaforementioned embodiment, the features thereof are not repeated in theinterest of brevity.

In this embodiment, the circuit board 7-600′ is also disposed in the gap7-140 between the frame 7-130 and the case 7-110, and includes a plateportion 7-610′ and a protruding portion 7-620′. A first surface 7-611′of the plate portion 7-610′ faces the frame 7-130, and second surface7-612′ of the plate portion 7-610′ faces the case 7-110. Different fromthe aforementioned embodiment is that the protruding portion 7-620′ issituated between the case 7-110 and the second surface 7-612′, theprotruding portion 7-620′ contacts the case 7-110, and the first surface7-611′ of the plate portion 7-610′ contacts the frame 7-130.

In summary, an optical member driving mechanism for driving an opticalmember having an optical axis is provided, including a fixed portion, amovable portion, a driving assembly, and a circuit board. The fixedportion includes a case and a frame, and a gap is formed therebetween.The movable portion is movably connected to the fixed portion, andconfigured to hold the optical member. The driving assembly can drivethe movable portion to move relative to the fixed portion. The circuitboard is disposed in the gap, and has a plate portion and a protrudingportion. The protruding portion is disposed between the plate portionand the fixed portion, so as to tightly dispose the circuit board in thegap.

Referring to FIGS. 104 and 105, FIG. 104 shows a perspective diagram ofan optical element 8-L disposed in a driving mechanism 8-1 in accordancewith an embodiment of the invention, and FIG. 105 shows a perspectivediagram of the driving mechanism 8-1 in FIG. 104 with the housing 8-Hremoved therefrom. The optical element 8-L, such as an optical lens, canbe joined to driving mechanism 8-1 and constitute a camera lens module.The camera lens module may be disposed in handheld digital products suchas mobile phones or tablet PCs for photographing or video recording.

In this embodiment, the driving mechanism 8-1 may comprise a voice coilmotor (VCM) for driving the optical element 8-L to move in a directionparallel to or perpendicular to an optical axis 8-O of the opticalelement 8-L, so as to perform auto-focusing (AF) or optical imagestabilizer (OIS) function of the camera lens module, wherein the opticalaxis 8-O is parallel to the Z axis.

As shown in FIGS. 104 and 105, the driving mechanism 8-1 primarilycomprises a housing 8-H, a base 8-B connected to the housing 8-H, and aholder 8-LH movably received in the housing 8-H. The housing 8-H and thebase 8-B are affixed to each other and constitute a fixed part of thedriving mechanism 8-1. Moreover, the holder 8-LH constitutes a movablepart of the driving mechanism 8-1 for holding the optical element 8-L. Aframe 8-F is affixed to the inner surface of the housing 8-H, and asheet spring 8-R1 connects the holder 8-LH to the frame 8-F, whereby theholder 8-LH and the optical element 8-L disposed in the holder 8-LH canmove relative to the housing 8-H and the base 8-B.

At least a magnetic element 8-M (e.g. magnet) is adhered to the frame8-F for driving the holder 8-LH to move relative to the housing 8-H andthe base 8-B by magnetic force. Moreover, an L-shaped circuit board 8-Cis arranged through two lateral sides of the polygonal base 8-B, and aplurality of terminals 8-P are formed at the bottom of the circuit board8-C to electrically connect to an external circuit. In this embodiment,the circuit board 8-C may be a multilayer flexible printed circuitboard.

FIG. 106 shows the circuit board 8-C and the base 8-B after assembly ofthe driving mechanism, and FIG. 107 shows a top view of the base 8-B,the magnetic elements 8-M, and the holder 8-LH after assembly of thedriving mechanism.

As shown in FIGS. 106 and 107, a position sensor 8-C1 and a filter 8-C2(e.g. capacitor) are disposed on the inner side of the circuit board8-C. The position sensor 8-C1 may be an integrated circuit element fordetecting the displacement of an object 8-HM (FIG. 107) on the holder8-LH (movable part) relative to the housing 8-H and the base 8-B (fixedpart). In this embodiment, the position sensor 8-C1 is a Hall effectsensor, and the object 8-HM comprises a magnet.

Referring to FIG. 107, a coil 8-W is disposed around the holder 8-LH andlocated corresponding to the magnetic elements 8-M. The coil 8-W and themagnetic elements 8-M can constitute a driving assembly for moving theholder 8-LH. When an external circuit applies a current signal to thecoil 8-W, the magnetic elements 8-M and the coil 8-W can generate anelectromagnetic force driving the holder 8-LH to move relative to thehousing 8-H and the base 8-B. Specifically, when viewed in the Zdirection, the circuit board 8-C and the holder 8-LH do not overlap.

Still referring to FIGS. 106 and 107, the base 8-B forms a firstprotrusion 8-B1 a second protrusion 8-B2, a third protrusion 8-B3, and afourth protrusion 8-B4 extending in the Z direction and located at thefour corners of the base 8-B. It should be noted that only the firstprotrusion 8-B1 is in contact with the circuit board 8-C, and the secondand fourth protrusions 8-B2 and 8-B4 are spaced apart from the circuitboard 8-C. Thus, mechanical interference between the circuit board 8-Cand the base 8-B can be reduced to facilitate rapid positioning andassembly of the driving mechanism.

In this embodiment, the first protrusion 8-B1 has a first flat outersurface 8-B11 perpendicular to the X axis, and the second protrusion8-B2 has a second flat outer surface 8-B21 perpendicular to the X axis.Specifically, the first and second flat outer surfaces 8-B11 and 8-B21are offset and have a distance 8-d along the X axis. That is, the firstand second flat outer surfaces 8-B11 and 8-B21 are located in differentposition along the X axis, whereby a space adjacent to the firstprotrusion 8-B1 can be provided for receiving the circuit board 8-C.

FIG. 108 shows a partial cross-sectional view taken along line 8-X1-8-X1in FIG. 104. As shown in FIGS. 104, 105 and 108, the holder 8-LH isconnected to the base 8-B via another sheet spring 8-R2. The sheetspring 8-R2 is a metal conductive element that has an end extendingthrough an opening portion 8-C3 (FIG. 108) of the circuit board 8-C.During assembly, the end of the sheet spring 8-R2 can be electricallyconnected to a conductive portion 8-C4 of the circuit board 8-C bysoldering, welding, or conductive glue. In this embodiment, theconductive portion 8-C4 is located adjacent to the opening portion 8-C3on the bottom side of the circuit board 8-C, and it is exposed to anouter surface 8-S1 of the circuit board 8-C.

It should be noted that the circuit board 8-C may be a multilayerflexible circuit board, wherein a trace 8-05 is embedded in the circuitboard 8-C and electrically connected to the position sensor 8-C1. Here,the conductive portion 8-C4 and the trace 8-05 are situated in differentlayers of the circuit board 8-C, and they partially overlap each otherwhen viewed along the X axis (horizontal direction).

Still referring to FIG. 108, as the sheet spring 8-R2 (conductiveelement) is electrically connected to the coil 8-W on the holder 8-LH bysoldering, welding, or conductive glue, an external circuit can apply anelectrical signal sequentially through the circuit board 8-C and thesheet spring 8-R2 to the coil 8-W, thereby generating an electromagneticforce for driving the holder 8-LH (movable part) to move relative to thehousing 8-H and the base 8-B (fixed part).

To reduce the height of the driving mechanism 8-1 in the Z direction,the position sensor 8-C1 on the inner surface 8-S2 of the circuit board8-C may be located close to the opening portion 8-C3 on the bottom sideof the circuit board 8-C. Moreover, when viewed along the Z direction,the position sensor 8-C1 overlap with the sheet spring 8-R2. In thisconfiguration, the conductive portion 8-C4 is only exposed to the outersurface 8-S1, but not exposed to the inner surface 8-S2 of the circuitboard 8-C, so that it is ensured that the opening portion 8-C3 can havea considerable thickness to provide more space and flexibility forcircuit design. Here, since the opening portion 8-C3 has a considerablethickness, the solder material would not flow from the outer surface8-S1 to the inner surface 8-S2 of the circuit board 8-C during thesoldering process.

FIG. 109 is a perspective view showing the object 8-HM and the coil 8-Wdisposed on the holder 8-LH, FIG. 110 is a partial enlarged view showingthe object 8-HM inserted in a recess 8-Q of the holder 8-LH, and FIG.111 is an enlarged partial cross-sectional view of the driving mechanism8-1 in FIG. 104.

Referring to FIGS. 109-111, a recess 8-Q is formed on the holder 8-LHfor receiving the object 8-HM (e.g. magnet). In this embodiment, therecess 8-Q extends from a bottom surface toward a top surface of theholder 8-LH in the Z direction. During assembly, the object 8-HM can beinserted into the recess 8-Q from the bottom surface toward the topsurface of the holder 8-LH, as the arrow indicates in FIG. 110, thuspreventing the object 8-HM from separating from the holder 8-LH due tothe magnetic forces generated by the magnetic elements 8-M or the coil8-W.

In some embodiments, the glue 8-G may be disposed in the recess 8-Qbefore inserting the object 8-HM into the recess 8-Q. After insertingthe object 8-HM into the recess 8-Q, the sheet spring 8-R2 can beassembled to the bottom side of the holder 8-LH, thereby facilitatingsimple and rapid assembly of the driving mechanism. It should be notedthat the recess 8-Q may penetrate through the holder 8-LH or not, andthe object 8-HM may be exposed to the bottom side of the holder 8-LHafter assembly.

Referring to FIGS. 112 to 114, FIG. 112 is a perspective diagram ofthree optical elements 9-L1, 9-L2 and 9-L3 received in a driving systemin accordance with an embodiment of the invention, FIG. 113 is aperspective diagram of the driving system in FIG. 112, and FIG. 114 is aperspective diagram of the driving system of FIG. 112 with the housings9-H1, 9-H2 and 9-H3 removed therefrom.

As shown in FIGS. 112 to 114, the driving system in this embodimentprimarily comprises a first module 9-1, a second module 9-2, and a thirdmodule L3 for holding and moving the three optical elements 9-L1, 9-L2and 9-L3. The optical elements 9-L1, 9-L2 and 9-L3 may be optical lenseshaving different focal lengths or optical effective diameters, and theyare joined in the first, second and third modules 9-1, 9-2 and 9-3 toconstitute a camera lens system. The camera lens system may be disposedin handheld digital products such as mobile phones or tablet PCs.

For example, the first, second and third modules 9-1, 9-2 and 9-3 maycomprise a voice coil motor (VCM) for driving the optical elements 9-L1,9-L2 and 9-L3 to move in a direction parallel to or perpendicular to theoptical axes thereof, so as to perform auto-focusing (AF) or opticalimage stabilizer (OIS) function of an the camera lens system, whereinthe optical axes of the optical elements 9-L1, 9-L2 and 9-L3 areparallel to the Z axis.

FIG. 114 shows three frames 9-F1, 9-F2 and 9-F3 are respectivelydisposed in the first, second and third modules 9-1, 9-2 and 9-3. Duringassembly, the frames 9-F1, 9-F2 and 9-F3 are respectively adhered to theinner surface of the housings 9-H1, 9-H2 and 9-H3. Moreover, three sheetsprings 9-R1, 9-R2 and 9-R3 respectively connect the frames 9-F1, 9-F2and 9-F3 to the holders 9-LH1, 9-LH2 and 9-LH3, whereby the holders9-LH1, 9-LH2 and 9-LH3 and the optical elements 9-L1, 9-L2 and 9-L3 aremovable relative to the frames 9-F1, 9-F2 and 9-F3 and the housings9-H1, 9-H2 and 9-H3.

Additionally, the first, second and third modules 9-1, 9-2 and 9-3respectively have a first magnetic element 9-M1, a second magneticelement 9-M2, and a third magnetic element 9-M3, and the first, secondand third magnetic elements 9-M1 to 9-M3 are respectively adhered to theframes 9-F1, 9-F2 and 9-F3. In this embodiment, the first, second andthird magnetic elements 9-M1, 9-M2 and 9-M3 are magnets, and when anexternal circuit applies current signals to the coils (not shown) on theholders 9-LH1, 9-LH2 and 9-LH3, electromagnetic forces can be generatedby the coils and the magnets. Thus, the holders 9-LH1, 9-LH2 and 9-LH3and the optical elements 9-L1, 9-L2 and 9-L3 can be driven to moverelative to the frames 9-F1, 9-F2 and 9-F3 and the housings 9-H1, 9-H2and 9-H3, so as to achieve auto-focusing (AF) or optical imagestabilizer (OIS) function of the camera lens system.

Still referring to FIGS. 112 to 114, the first, second and third modules9-1, 9-2 and 9-3 respectively comprise a first circuit board 9-C1, asecond circuit board 9-C2, and a third circuit board 9-C3 thatelectrically connect the coils on the holders 9-LH1, 9-LH2 and 9-LH3 toan external circuit. As shown in FIGS. 112 and 113, the first circuitboard 9-C1 has a first terminal 9-P1 located on a first side 9-S1 of thefirst module 9-1, the second circuit board 9-C2 has a second terminal9-P2 located on a second side 9-S2 of the second module 9-2, and thethird circuit board 9-C3 has a third terminal 9-P3 located on a thirdside 9-S3 of the third module 9-3. In some embodiments, the first,second and third terminals 9-P1 to 9-P3 may be directly embedded in thebases of the first, second and third modules 9-1 to 9-3 without thecircuit boards 9-C1 to 9-C3.

It should be noted that the first, second and third sides 9-S1 to 9-S3of the first, second and third modules 9-1 to 9-3 are located on thesame side of the driving system. As at least two of the first, secondand third terminals 9-P1 to 9-P3 are located on the same side of thedriving system, they can be electrically connected to the externalcircuit by a single process (e.g. soldering, welding or conductive glue)without rotation of the driving system, thereby increasing assemblyefficiency and reducing the production cost.

FIGS. 115-117 are perspective diagrams and top view of the drivingsystem with the housings 9-H1 to 9-H3, the frames 9-F1 to 9-F3, and theholders 9-LH1 to 9-LH3 removed therefrom. As shown in FIGS. 115-117, thefirst circuit board 9-C1 has an L-shaped structure extending from thefirst side 9-S1 to a fourth side 9-S4 of the first module 9-1 (FIG.116). Moreover, the second circuit board 9-C2 is disposed only on thesecond side 9-S2 of the second module 9-2, and the third circuit board9-C3 has an L-shaped structure extending from the third side 9-S3 to afifth side 9-S5 of the third module 9-3 (FIG. 116).

Specifically, when viewed along the optical axes of the optical elements9-L1 to 9-L3 (Z direction), the first magnetic element 9-M1 partiallyoverlaps the first circuit board 9-C1 on the first side 9-S1, and thethird magnetic element 9-M3 partially overlaps the third circuit board9-C3 on the third side 9-S3, so as to improve space utilization of thedriving system.

In this embodiment, a position sensor 9-HS and a filter 9-CF (e.g.capacitor) are disposed on an inner surface of each of the first, secondand third circuit boards 9-C1 to 9-C3. The position sensor 9-HS may be aHall effect sensor for detecting the movement of the holder 9-LH1 to9-LH3 relative to the housings 9-H1 to 9-H3, so as to facilitate aclosed-loop control of the driving system.

As shown in FIG. 117, a sixth side 9-S6 of the first module 9-1 faces aseventh side 9-S7 of the second module 9-2. Each of the first magneticelements 9-M1 are disposed on a side of the first module 9-1 other thanthe sixth side 9-S6 (e.g. the first side 9-S1), and one of the secondmagnetic elements 9-M2 is disposed on the seventh side 9-S7, so that thefirst and second magnetic elements 9-M1 and 9-M2 are distant from eachother to prevent magnetic interference therebetween.

Similarly, an eighth side 9-S8 of the second module 9-2 faces a ninthside 9-S9 of the third module 9-3. One of the second magnetic elements9-M2 is disposed on a side of the second module 9-2, and the thirdmagnetic elements 9-M3 are disposed on the sides of the third module 9-3other than the ninth side 9-S9 (e.g. the third side 9-S3), so that thesecond and third magnetic elements 9-M2 and 9-M3 are distant from eachother to prevent magnetic interference therebetween. In this embodiment,the first and third magnetic elements 9-M1 and 9-M3 have a longitudinalstructure parallel to the X axis (first direction), and the secondmagnetic element 9-M2 has a longitudinal structure parallel to the Yaxis (second direction).

FIG. 118 are shows a side view of the first, second and third modules9-1, 9-2 and 9-3. As shown in FIG. 118, the housing 9-H1 of the firstmodule 9-1 has a first top surface 9-H11, the housing 9-H2 of the secondmodule 9-2 has a second top surface 9-H21, and the housing H3 of thethird module 9-3 has a third top surface 9-H31. Here, the first, secondand third top surfaces 9-H11 to 9-H31 are at substantially the sameheight along the Z axis.

It should be noted that the first, second and third modules 9-1, 9-2 and9-3 may have different thicknesses along the Z axis, corresponding tothe optical elements 9-L1 to 9-L3 that have different focal lengths oroptical effective diameters. During assembly, the first, second andthird top surfaces 9-H11 to 9-H31 of the first, second and third modules9-1, 9-2 and 9-3 are positioned and aligned to each other at the sameheight of the Z axis, thus facilitating accurate positioning andassembly between the first, second and third modules 9-1, 9-2 and 9-3.

FIGS. 119 to 125 show different arrangements of the first, second andthird terminals 9-P1 to 9-P3, the first, second and third magneticelements 9-M1 to 9-M3, and the first, second and third circuit boards9-C1 to 9-C3 in the driving system. Referring to the embodiment of FIG.119, one of the first magnetic elements 9-M1 is disposed on the sixthside 9-S6, and two second magnetic elements 9-M2 are disposed on thesides of the second module 9-2 other than the seventh and eighth sides9-S7 and 9-S8 (e.g. the second side 9-S2). In this configuration, thethird magnetic element 9-M3 can be disposed on each side of the thirdmodule 9-3 (e.g. the ninth side 9-S9 or the other sides). Thus, thefirst, second and third magnetic elements 9-M1 to 9-M3 are distant fromeach other to prevent magnetic interference therebetween. In thisembodiment, only an L-shaped third circuit board 9-C3 is provided in thethird module 9-3, and the first and second circuit boards 9-C1 and 9-C2are omitted from the driving system.

In the embodiment of FIG. 120, two first magnetic elements 9-M1 aredisposed on the sides other than the sixth side 9-S6 (e.g. the firstside 9-S1), and two second magnetic elements 9-M2 are disposed on theseventh and eighth sides 9-S7 and 9-S8 of the second module 9-2. In thisconfiguration, two third magnetic elements 9-M3 are disposed on thesides of the third module 9-3 other than the ninth side 9-S9 (e.g. thethird side 9-S3). Thus, the first, second and third magnetic elements9-M1 to 9-M3 are distant from each other to prevent magneticinterference therebetween. In this embodiment, an L-shaped first circuitboard 9-C1 and an L-shaped third circuit boards 9-C3 are provided in thefirst and third modules 1 and 3, and the second circuit board 9-C2 isomitted from the driving system.

In the embodiment of FIG. 121, two first magnetic elements 9-M1 aredisposed on the sides of the first module 9-1 other than the sixth side9-S6 (e.g. the first side 9-S1), and two second magnetic elements 9-M2are disposed on the sides other than the seventh and eighth sides 9-S7and 9-S8 (e.g. the second side 9-S2). Furthermore, two third magneticelements 9-M3 are disposed on the sides of the third module 9-3 otherthan the ninth side 9-S9 (e.g. the third side 9-S3). Thus, the first,second and third magnetic elements 9-M1 to 9-M3 are distant from eachother to prevent magnetic interference therebetween. In this embodiment,the L-shaped first, second and third circuit boards 9-C1 to 9-C3 arerespectively provided in the first, second and third module 9-1-3,wherein the second circuit board 9-C2 may extend from the second side9-S2 to the seventh side 9-S7 or the eighth side 9-S8 without magneticinterference from the magnetic elements 9-M1 to 9-M3.

In the embodiment of FIG. 122, two first magnetic elements 9-M1 aredisposed on the sides other than the sixth side 9-S6 of the first module9-1 (e.g. the first side 9-S1), and two second magnetic elements 9-M2are disposed on the seventh and eighth sides 9-S7 and 9-S8 of the secondmodule 9-2. In this configuration, two third magnetic elements 9-M3 aredisposed on the sides other than the ninth side 9-S9 of the third module9-3 (e.g. the third side 9-S3). Thus, the first, second and thirdmagnetic elements 9-M1 to 9-M3 are distant from each other to preventmagnetic interference therebetween. In this embodiment, only an L-shapedfirst circuit board 9-C1 is provided in the first module 9-1, and thesecond and circuit boards 9-C2 and 9-C3 are omitted from the drivingsystem. Moreover, the third terminal 9-P3 is disposed on the fifth side9-S5 of the third module 9-3.

In the embodiment of FIG. 123, the first magnetic elements 9-M1 may havea triangular structure and are disposed at the four corners of the firstmodule 9-1. Similarly, the third magnetic elements 9-M3 may have atriangular structure and are disposed at the four corners of the thirdmodule 9-3. In this configuration, two second magnetic elements 9-M2 canbe disposed on the seventh and eighth sides 9-S7 and 9-S8 of the secondmodule 9-2 to prevent magnetic interference between the first, secondand third magnetic elements 9-M1 to 9-M3.

In the embodiment of FIG. 124, four triangular first magnetic elements9-M1 are disposed at the four corners of the first module 9-1, and fourtriangular third magnetic elements 9-M3 are disposed at the four cornersof the third module 9-3. In this configuration, two second magneticelements 9-M2 are disposed on the sides other than the seventh andeighth sides 9-S7 and 9-S8 of the second module 9-2, so that magneticinterference between the first, second and third magnetic elements 9-M1to 9-M3 can be avoided. Specifically, an L-shaped circuit board 9-C2 isprovided in the second module 9-2, and it may extend from the secondside 9-S2 to the seventh side 9-S7 or the eighth side 9-S8 withoutmagnetic interference from the magnetic elements 9-M1 to 9-M3 to theposition sensor 9-HS.

Similarly, in the embodiment of FIG. 125, four triangular secondmagnetic elements 9-M2 are disposed at the four corners of the secondmodule 9-2. In this configuration, one of the first magnetic elements9-M1 can be disposed on the sixth side 9-S6 of the first module 9-1, andone of the third magnetic elements 9-M3 can be disposed on the ninthside 9-S9 of the third module 9-3. Thus, the first, second and thirdmagnetic elements 9-M1 to 9-M3 are distant from each other to preventmagnetic interference therebetween.

FIGS. 126 and 127 are perspective diagrams of a driving system inaccordance another embodiment of the invention. In this embodiment, thefirst, second and third modules 9-1 to 9-3 are arranged in an L-shapedmanner, wherein the first and second terminals 9-P1 and 9-P2 are locatedon the same sides of the driving system, and the third terminal 9-P3 islocated on a different side of the driving system than the first andsecond terminals 9-P1 and 9-P2.

Referring to FIG. 127, the third terminal 9-P3 is disposed on a thirdside 9-S3 of the third module 9-3, wherein the third side 9-S3 isparallel to the first and second sides 9-S1 and 9-S2 of the first andsecond modules 9-1 and 9-2. In some embodiments, however, the thirdterminal 9-P3 may be disposed on another side other than the third side9-S3, such as the side 9-S3′ or 9-S3″ that is perpendicular to the firstand second sides 9-S1 and 9-S2.

As mentioned above, since at least two of the first, second and thirdterminals 9-P1 to 9-P3 are located on the same side of the drivingsystem, they can be electrically connected to an external circuit by asingle process (e.g. soldering, welding or conductive glue) withoutrotation of the driving system, thus increasing assembly efficiency andreducing the production cost.

Please refer to FIG. 128, FIG. 128 is a perspective schematic view of anoptical element driving mechanism 10-100 according to an embodiment ofthe present disclosure. As shown in FIG. 128, the optical elementdriving mechanism 10-100 carries an optical element 10-110, and theoptical element 10-110 has an optical axis 10-O.

FIG. 129 is an exploded view of the optical element driving mechanism10-100 according to an embodiment of the present disclosure. As shown inFIG. 129, the optical element driving mechanism 10-100 includes a fixedpart 10-10, a movable part 10-20, a metallic member 10-30, a drivingassembly 10-40, an elastic assembly 10-50, a position sensing assembly10-60 and a connector 10-70.

The fixed part 10-10 includes a base 10-11, a frame 10-12 and an outerframe 10-13. The base 10-11 is located under the frame 10-12 and theouter frame 10-13, and the frame 10-12 is located between the base 10-11and the outer frame 10-13. The base 10-11 includes a first side 10-111,a second side 10-112, a standing wall 10-113 and a base opening 10-114.The first side 10-111 is not parallel to the second side 10-112. In anembodiment, the first side 10-111 is perpendicular to the second side10-112, and the first side 10-111 and the second side 10-112 areperpendicular to the optical axis 10-O. The standing wall 10-113 isdisposed on the first side 10-111, and the standing wall 10-113 extendsalong the optical axis 10-O. The standing wall 10-113 has an inner sidewall 10-1131 and a protruding part 10-1132, and the inner side wall10-1131 faces the movable part 10-20. The protruding part 10-1132 isformed on the inner side wall 10-1131. The base opening 10-114 iscorresponding to an image sensing element (not shown) which is disposedoutside the optical element driving mechanism 10-100. The frame 10-12has a frame opening 10-121 and a frame side 10-122. The outer frame10-13 has an outer frame opening 110-31, a center of the outer frameopening 10-131 is corresponding to the optical axis 10-O of the opticalelement 10-110. Accordingly, the optical element 10-110 disposed in theoptical element driving mechanism 10-100 and the image sensing elementcan perform image focusing in the direction of the optical axis 10-O.

The movable part 10-20 is movably connected to the fixed part 10-10 andcarries the optical element 10-110. The movable part 10-20 has a hollowring structure and a through hole 10-21. The movable part 10-20 also hasa threaded structure 10-22, which is formed on the through hole 10-21.The optical element 10-110 can be locked in the through hole 10-22. Inthis embodiment, the movable part 10-20 and the optical element 10-110are movably disposed within the frame 10-12.

The metallic member 10-30 is disposed on the base 10-11, and themetallic member 10-30 includes an inner electrical connection part 10-31and an outer electrical connection part 10-32, and the inner electricalconnection part 10-31 and the outer electrical connection part 10-32 areconnected to each other. The metallic member 10-30 is made ofelectrically conductive material, for example, the metallic member 10-30may be made of electrically conductive metals or electrically conductivealloys. For example, the metallic member 10-30 may be made ofelectrically conductive metals such as silver, copper, gold, aluminum,tungsten, iron, titanium, etc. or electrically conductive alloys such asthe alloys thereof. The metallic member 10-30 extends from the secondside 10-112 of the base 10-11 to the first side 10-111 of the base10-11. The inner electrical connection part 10-31 of the metallic member10-30 protrudes upwardly in the direction of the optical axis 10-O, andthe outer electrical connection part 10-32 of the metallic member 10-30protrudes downwardly in the direction of the optical axis 10-O. In thisway, it may facilitate the connection between the inner electricalconnection part 10-31 and the other elements of the optical elementdriving mechanism 10-100, and it may also facilitate the connectionbetween the outer electrical connection part 10-32 and an external powersupply (not shown) which is disposed outside the optical element drivingmechanism 10-100. Each one of the inner electrical connection part 10-31is connected to each one of the outer electrical connection part 10-32so as to conduct an electrical current from the outer electricalconnection part 10-32 to the inner electrical connection part 10-31.

The driving assembly 10-40 drives the movable part 10-20 to moverelative to the fixed part 10-10, and the driving assembly 10-40includes at least one driving magnetic element 10-1141 and a coil 10-42.In one embodiment (such as the embodiment shown in FIG. 131), thedriving assembly 10-40 may include at least two driving magneticelements 10-1141, and the driving magnetic elements 10-1141 are disposedon two opposite sides of the base 10-11. In other words, in thisembodiment, each one of the driving magnetic elements 10-1141 is notadjacent to each other. In this way, magnetic interference between eachone of the driving magnetic elements 10-1141 is prevented, and thefocusing speed and positioning accuracy of the optical element drivingmechanism 10-100 are improved, and miniaturization of the opticalelement driving mechanism 10-100 is achieved. Moreover, the drivingmagnetic elements 10-1141 are fixed on the frame side 10-122 of theframe 10-12 to avoid the movement of the driving magnetic elements10-1141 with respect to the frame 10-12. The driving magnetic elements10-1141 may be permanent magnets, and the shapes of the driving magneticelements 10-1141 may be stripes or triangles.

The coil 10-42 of the driving assembly 10-40 is wound around an outerperipheral surface of the movable part 10-20. When the electricalcurrent is applied to the coil 10-42, the coil 10-42 can act with themagnetic field of the driving magnetic elements 10-1141 to generate anelectromagnetic force to drive the movable part 10-20 and the opticalelement 10-110 to move in the direction of the optical axis 10-O.

The elastic assembly 10-50 includes an upper spring 10-51 and a lowerspring 10-52. The upper spring 10-51 of the elastic assembly 10-50 isdisposed on the movable part 10-20. The elastic assembly 10-50 iselastically connected to the fixed part 10-10 and the movable part10-20, so that the movable part 10-20 can be suspended. The elasticassembly 10-50 may be made of electrically conductive metals orelectrically conductive alloys. For example, the elastic assembly 10-50may be made of electrically conductive metals such as silver, copper,gold, aluminum, tungsten, iron, titanium, etc. or electricallyconductive alloys such as the alloys thereof.

The position sensing assembly 10-60 has a sensing magnet 10-61. Theposition sensing assembly 10-60 is disposed on the first side 10-111,and the sensing magnet 10-61 is disposed on the movable part 10-20. Theposition sensing assembly 10-60 may be a Hall Effect Sensor,Magnetoresistance Effect Sensor (MR Sensor), Giant MagnetoresistanceEffect Sensor (GMR Sensor), Tunneling Magnetoresistance Effect Sensor(TMR Sensor), or Fluxgate. The sensing magnet 10-61 may be a permanentmagnet.

The connector 10-70 is disposed between the elements to fix variouselements, and the connector 10-70 electrically connects variouselements. The connector 10-70 may be solder made of tin alloy, such astin-lead alloy, tin-silver-copper alloy, tin-copper alloy, tin-nickelalloy, tin-indium alloy, tin-stibium alloy, tin-silver alloy, tin-goldalloy, tin-palladium alloy, tin-platinum alloy, etc. It should beunderstood that the connector 10-70 may also be other electricallyconnectable materials, such as electrically conductive glue.

Please refer to FIG. 130, FIG. 130 shows a schematic view of the fixedpart 10-10, the movable part 10-20 and the lower spring 10-52. The lowerspring 10-52 of the elastic assembly 10-50 is disposed under the movablepart 10-20, and the lower spring 10-52 is elastically connected to thefixed part 10-10 and the movable part 10-20, so that the movable part10-20 can be suspended. More specifically, the movable part 10-20 can besuspended in the frame opening 10-121 of the frame 10-12 by the elasticassembly 10-50 with metallic materials.

Please refer to FIG. 131, FIG. 131 shows a schematic view of the opticalelement driving mechanism 10-100 omitting the frame 10-12 and the outerframe 10-13, wherein the movable part 10-20 is illustrated with dottedline to clearly show the relation between various elements. The metallicmember 10-30 extends adjacent to the standing wall 10-113. The innerelectrical connection part 10-31 of the metallic member 10-30 isdisposed on the first side 10-111 of the base 10-11, and the outerelectrical connection part 10-32 is disposed on the second side 10-112of the base 10-11, in this way, it facilitates the assembly of theoptical element driving mechanism 10-100 and the other elements.

As shown in FIG. 131, the driving magnetic elements 10-1141 are disposedon the second side 10-112 and the opposite side of the second side10-112, and the first side 10-111 is not disposed with any drivingmagnetic elements 10-1141. It should be noted that, in this embodiment,the optical element driving mechanism 10-100 is provided with twodriving magnetic elements 10-1141, and the driving magnetic elements10-1141 are disposed by the aforementioned manner. However, in otherembodiments, when the optical element driving mechanism 10-100 isprovided with three driving magnetic elements 10-1141, a counter weight(not shown) may be provided to balance the weight of the optical elementdriving mechanism 10-100.

The position sensing assembly 10-60 is disposed on the inner side wall10-1131 of the standing wall 10-113. The sensing magnet 10-61 isdisposed on the movable part 10-20. The position sensing assembly 10-60is electrically connected to the inner electrical connection part 10-31of the metallic member 10-30 via an internal circuit (not shown) of thestanding wall 10-113. The lower spring 10-52 is disposed adjacent to theinner electrical connection part 10-31, and the connector 10-70 isdisposed between the inner electrical connection part 10-31 and thelower spring 10-52, so that the inner electrical connection part 10-31is electrically connected to the lower spring 10-52. In this way, themagnetic variance caused by the movement of the sensing magnet 10-61 canbe detected by the position sensing assembly 10-60 to determine theposition displacement of the movable part 10-20 with respect to the base10-11 in the direction of the optical axis 10-O. Alternatively, theposition sensing assembly 10-60 can also determine the positiondisplacement of the movable part 10-20 with respect to the base 10-11 inthe direction perpendicular to the optical axis 10-O.

FIG. 132 shows a partial schematic view of the inner electricalconnection part 10-31 and the driving assembly 10-40. As shown in FIG.132, the coil 10-42 of the driving assembly 10-40 is disposedcorresponding to the driving magnetic elements 10-1141. Moreover, thecoil 10-42 has a coil extension 10-421, the coil extension 10-421extends from the coil 10-42 to surroundings of the inner electricalconnection part 10-31 of the metallic member 10-30 and the lower spring10-52 of the elastic assembly 10-50, and the connector 10-70 is disposedbetween the inner electrical connection part 10-31, the coil extension10-421 and the lower spring 10-52, so that the inner electricalconnection part 10-31, the coil 10-42 and the lower spring 10-52 areelectrically connected. Therefore, the electrical current can flow fromthe outer electrical connection part 10-32 to the coil 10-42 through thelower spring 10-52, so that the driving magnetic elements 10-1141 andthe coil 10-42 drive the movable part 10-20 to move relative to thefixed part 10-10.

Please refer to FIG. 133, FIG. 133 shows a cross-sectional view of theoptical element driving mechanism 10-100 along line 10-A-10-A in FIG.128. When observed in the direction of the optical axis 10-O, the outerelectrical connection part 10-32 partially overlaps one of the drivingmagnetic elements 10-1141. In this way, it facilitates the assembly ofthe optical element driving mechanism 10-100, and the effect ofminiaturization is achieved.

Please refer to FIGS. 134 and 135, FIG. 134 shows a cross-sectional viewof the optical element driving mechanism 10-100 along line 10-B-10-B inFIG. 128, and FIG. 135 shows a top view of the movable part 10-20, thestanding wall 10-113 and the position sensing assembly 10-60. A shortestdistance between the protruding part 10-1132 of the standing wall 10-113and the movable part 10-20 is shorter than a shortest distance betweenthe position sensing assembly 10-60 and the movable part 10-20. In otherwords, the protruding part 10-1132 is closer to the movable part 10-20than the position sensing assembly 10-60 is. In this way, when themovable part 10-20 moves in the direction perpendicular to the opticalaxis 10-O, the movable part 10-20 will contact the protruding part10-1132 without contacting the position sensing assembly 10-60 toprotect the position sensing assembly 10-60, and to prevent damage dueto contact between the position sensing assembly 10-60 and the movablepart 10-20. Without affecting other elements, the extended length of theprotruding part 10-1132 along the first side 10-111 is longer, thestructural strength of the standing wall 10-113 is stronger.

FIG. 136 shows a perspective view of an optical element driving system10-200 according to an embodiment of the present disclosure, and FIG.137 shows a perspective view of the optical element driving system10-200 omitting the outer frames 10-13 and the optical elements 10-110.As shown in FIGS. 136 and 137, the optical element driving system 10-200includes at least two optical element driving mechanisms 10-100. Sincethe metallic members 10-30 of the optical element driving mechanisms10-100 extend from the second sides 10-112 of the bases 10-11 of theoptical element driving mechanisms 10-100 to the first sides 10-111 ofthe bases 10-11, and each one of the inner electrical connection part10-31 of the metallic members 10-30 is electrically connected to eachone of the outer electrical connection part 10-32 of the metallicmembers 10-30, so that some of the elements may be disposed on the firstsides 10-111 (such as the position sensing assembly 10-60), and each oneof the outer electrical connection part 10-32 of the optical elementdriving mechanisms 10-100 may be on a same side 10-210 of the opticalelement driving system 10-200. Therefore, the driving magnetic elements10-1141 which are disposed on the second sides 10-112 and the oppositeside of the second sides 10-112 are on a same side of the opticalelement driving system 10-200 and on the opposite side of it,respectively. Moreover, the driving magnetic elements 10-1141 are notdisposed on the adjacent sides of the bases 10-11 of the optical elementdriving mechanisms 10-100. In other words, the driving magnetic elements10-1141 are not provided between the optical element driving mechanisms10-100. In this way, it facilitates the assembly of the optical elementdriving system 10-200, and magnetic interference between the drivingmagnetic elements 10-1141 of the adjacent optical element drivingmechanisms 10-100 is prevented, and the focusing speed and positioningaccuracy of the optical element driving system 10-200 are improved, andminiaturization of the optical element driving system 10-200 isachieved.

Referring to FIGS. 138-140, in some embodiments, an optical memberdriving mechanism 11-100 is disposed on a portable device 11-200 (suchas a smartphone) and configured to drive at least one optical member11-300 to move relative to the portable device 11-200, wherein theoptical member 11-300 can be a lens having an optical axis 11-310. Theoptical member driving mechanism 11-100 includes at least one fixedportion, at least one movable portion, at least one driving assembly,and at least one image sensor 11-110. It should be noted that, in theseembodiments, the fixed portion, movable portion, and the drivingassembly are the same as the fixed portion 3-100, the movable portion3-200, and the driving assembly 3-500 shown in FIGS. 23 and 24, thefeatures thereof are not repeated in the interest of brevity.

The image sensor 11-110 substantially has a rectangular structure, andincludes an image sensor long side 11-111 and an image sensor short side11-112. The portable device 11-200 also substantially has a rectangularstructure, and includes a portable device long side 11-210 and aportable device short side 11-220. The image sensor long side 11-111 issubstantially parallel to the portable device long side 11-210.

In the embodiments of FIGS. 138-140, the optical member drivingmechanism 11-110 includes a plurality of fixed portions, a plurality ofmovable portions, a plurality of driving assemblies, and a plurality ofimage sensors 11-110. Each of the image sensors 11-110 substantially hasthe rectangular structure, and includes the image sensor long side11-111 and the image sensor short side 11-112. The image sensor longsides 11-111 are substantially parallel to the portable device long side11-210.

Since the image sensor long sides 11-111 are substantially parallel tothe portable device long side 11-210, the efficiency of photographingcan be enhanced, and the undesired crop can be prevented. Furthermore,the structures of the aforementioned embodiments can be applied on theseoptical member driving mechanisms 11-100, so as to achieve the purposeof reducing electromagnetic interference, miniaturization, or improvingstructural strength.

Although the embodiments and their advantages have been described indetail, it should be understood that various changes, substitutions, andalterations can be made herein without departing from the spirit andscope of the embodiments as defined by the appended claims. Moreover,the scope of the present application is not intended to be limited tothe particular embodiments of the process, machine, manufacture,composition of matter, means, methods, and steps described in thespecification. As one of ordinary skill in the art will readilyappreciate from the disclosure, processes, machines, manufacture,compositions of matter, means, methods, or steps, presently existing orlater to be developed, that perform substantially the same function orachieve substantially the same result as the corresponding embodimentsdescribed herein can be utilized according to the disclosure.Accordingly, the appended claims are intended to include within theirscope such processes, machines, manufacture, compositions of matter,means, methods, or steps. In addition, each claim constitutes a separateembodiment, and the combination of various claims and embodiments arewithin the scope of the disclosure.

What is claimed is:
 1. An optical member driving mechanism for drivingan optical member having an optical axis, comprising: a fixed portion,comprising a case and a frame, wherein the frame is disposed in thecase, and a gap is formed between the case and the frame; a movableportion, movably connected to the fixed portion and configured to holdthe optical member; a driving module, driving the movable portion tomove relative to the fixed portion; and a circuit board, disposed in thegap and comprising a plate portion and a protruding portion, wherein theprotruding portion is situated between the plate portion and the fixedportion, so as to tightly dispose the circuit board in the gap.
 2. Theoptical member driving mechanism as claimed in claim 1, wherein theplate portion has a first surface and a second surface, the firstsurface faces the frame, and the second surface faces the case.
 3. Theoptical member driving mechanism as claimed in claim 2, wherein theprotruding portion is situated between the frame and the first surface.4. The optical member driving mechanism as claimed in claim 3, whereinthe protruding portion contacts the frame, and the second surfacecontacts the case.
 5. The optical member driving mechanism as claimed inclaim 4, wherein the fixed portion further comprises a base disposed ona side of the movable portion, and the base contacts the first surface,wherein the base is closer to the plate portion than the frame as seenfrom a direction that is perpendicular to the optical axis.
 6. Theoptical member driving mechanism as claimed in claim 2, wherein theprotruding portion is situated between the case and the second surface,the protruding portion contacts the case, and the first surface contactsthe frame.
 7. The optical member driving mechanism as claimed in claim1, wherein the fixed portion further comprises a base disposed on a sideof the movable portion, and the protruding portion does not overlap thebase as seen from a direction that is perpendicular to the optical axis.8. The optical member driving mechanism as claimed in claim 7, whereinthe base has a supporting portion, disposed in a peripheral area of thebase and extending along the optical axis, wherein the supportingportion is attached on a first surface of the plate portion.
 9. Theoptical member driving mechanism as claimed in claim 1, wherein theoptical member driving mechanism further comprises a sensor disposed onthe circuit board, and the protruding portion overlaps the sensor asseen from a direction that is perpendicular to the optical axis.
 10. Theoptical member driving mechanism as claimed in claim 9, wherein a recessis formed on the protruding portion, and the sensor is disposed in therecess.
 11. The optical member driving mechanism as claimed in claim 1,wherein the fixed portion further comprises a base, disposed on a sideof the movable portion and having a top surface and a bottom surface,wherein the case has a bending portion, the top surface faces themovable portion, and the bottom surface is situated between the topsurface and the bending portion.
 12. The optical member drivingmechanism as claimed in claim 1, wherein the case has a case surface anda depression formed on the case surface, and the frame has a framesurface and a protrusion formed on the frame surface, wherein the framesurface and the case surface are perpendicular to the optical axis, theframe surface faces the case surface, and the protrusion is accommodatedin the depression.
 13. The optical member driving mechanism as claimedin claim 1, wherein the movable portion has an accommodating hole foraccommodating the optical member, the accommodating hole comprises asmooth segment, a threaded segment, and a connecting segment, the smoothsegment and the threaded segment are arranged along the optical axis,and the connecting segment connects the smooth segment to the threadedsegment, wherein the wall surface of the smooth segment is parallel tothe optical axis, and the wall surface of the connecting segment isperpendicular to the optical axis.
 14. The optical member drivingmechanism as claimed in claim 1, wherein the driving assembly comprisesa coil module, and the coil module comprises a first wire and a secondwire in parallel.
 15. The optical member driving mechanism as claimed inclaim 14, wherein both the first wire and the second wire haverectangular cross-sections.
 16. The optical member driving mechanism asclaimed in claim 15, wherein the rectangular cross-sections of the firstwire and/or the second wire have fillets.
 17. The optical member drivingmechanism as claimed in claim 14, wherein the movable portion furthercomprises an optical member holder, the first wire is attached on theoptical member holder and disposed between the optical member holder andthe second wire.
 18. The optical member driving mechanism as claimed inclaim 17, wherein the stacking rectangular cross-sections of the firstwire and/or the stacking rectangular cross-sections of the second wireare aligned to each other as seen from the optical axis.
 19. The opticalmember driving mechanism as claimed in claim 17, wherein the stackingrectangular cross-sections of the first wire are aligned to the stackingrectangular cross-sections of the second wire as seen from a directionthat is perpendicular to the optical axis.
 20. The optical memberdriving mechanism as claimed in claim 14, wherein the first wire and/orthe second wire are adhesive.